In the chaos of the late 12th century, a chieftain named Temüjin finally succeeded in uniting the Mongol tribes between Manchuria and the Altai Mountains. In 1206, he took the title Genghis Khan, and waged a series of military campaigns – renowned for their brutality and ferocity – sweeping through much of Asia, and forming the Mongol Empire, the largest contiguous land empire in world history. Under his successors it stretched from present-day Poland in the west to Korea in the east, and from parts of Siberia in the north to the Gulf of Oman and Vietnam in the south, covering some 33,000,000 square kilometres (13,000,000 sq mi), (22% of Earth's total land area) and had a population of over 100 million people (about a quarter of Earth's total population at the time). The emergence of Pax Mongolica also significantly eased trade and commerce across Asia during its height.
After Genghis Khan's death, the empire was subdivided into four kingdoms or Khanates. These eventually became quasi-independent after the Toluid Civil War (1260–1264), which broke out in a battle for power following Möngke Khan's death in 1259. One of the khanates, the "Great Khaanate", consisting of the Mongol homeland and most of modern-day China, became known as the Yuan dynasty under Kublai Khan, the grandson of Genghis Khan. He set up his capital in present-day Beijing. After more than a century of power, the Yuan dynasty was overthrown by the Ming dynasty in 1368, and the Yuan court fled to the north, thus becoming the Northern Yuan dynasty. As the Ming armies pursued the Mongols into their homeland, they successfully sacked and destroyed the Mongol capital Karakorum and other cities. Some of these attacks were repelled by the Mongols under Ayushridar and his general Köke Temür.
After the expulsion of the Yuan rulers from China proper, the Mongols continued to rule their homeland, known in historiography as the Northern Yuan dynasty. The next centuries were marked by violent power struggles among various factions, notably the Genghisids and the non-Genghisid Oirats, as well as by several Ming invasions (such as the five expeditions led by the Yongle Emperor).
In the early 16th century, Dayan Khan and his khatun Mandukhai reunited the entire Mongol nation under the Genghisids. In the mid-16th century, Altan Khan of the Tümed, a grandson of Dayan Khan – but not a hereditary or legitimate Khan – became powerful. He founded Hohhot in 1557. After he met with the Dalai Lama in 1578, he ordered the introduction of Tibetan Buddhism to Mongolia. (It was the second time this had occurred.) Abtai Khan of the Khalkha converted to Buddhism and founded the Erdene Zuu monastery in 1585. His grandson Zanabazar became the first Jebtsundamba Khutughtu in 1640. Following the leaders, the entire Mongolian population embraced Buddhism. Each family kept scriptures and Buddha statues on an altar at the north side of their ger (yurt). Mongolian nobles donated land, money and herders to the monasteries. As was typical in states with established religions, the top religious institutions, the monasteries, wielded significant temporal power in addition to spiritual power.
The last Mongol Khan was Ligden Khan in the early 17th century. He came into conflicts with the Manchus over the looting of Chinese cities, and also alienated most Mongol tribes. He died in 1634. By 1636 most Inner Mongolian tribes had submitted to the Manchus, who founded the Qing dynasty. The Khalkha eventually submitted to Qing rule in 1691, thus bringing all of today's Mongolia under Manchu rule. After several Dzungar–Qing Wars, the Dzungars (western Mongols or Oirats) were virtually annihilated during the Qing conquest of Dzungaria in 1757 and 1758.
Some scholars estimate that about 80% of the 600,000 or more Dzungar were destroyed by a combination of disease and warfare. Outer Mongolia was given relative autonomy, being administered by the hereditary Genghisid khanates of Tusheet Khan, Setsen Khan, Zasagt Khan and Sain Noyon Khan. The Jebtsundamba Khutuktu of Mongolia had immense de facto authority. The Manchu forbade mass Chinese immigration into the area, which allowed the Mongols to keep their culture. The Oirats who migrated to the Volga steppes in Russia became known as Kalmyks.
The main trade route during this period was the Tea Road through Siberia; it had permanent stations located every 25 to 30 kilometres (16 to 19 mi), each of which was staffed by 5–30 chosen families.
Until 1911, the Qing dynasty maintained control of Mongolia with a series of alliances and intermarriages, as well as military and economic measures. Ambans, Manchu "high officials", were installed in Khüree, Uliastai, and Khovd, and the country was divided into numerous feudal and ecclesiastical fiefdoms (which also placed people in power with loyalty to the Qing). Over the course of the 19th century, the feudal lords attached more importance to representation and less importance to the responsibilities towards their subjects. The behaviour of Mongolia's nobility, together with usurious practices by Chinese traders and the collection of imperial taxes in silver instead of animals, resulted in widespread poverty among the nomads. By 1911 there were 700 large and small monasteries in Outer Mongolia; their 115,000 monks made up 21% of the population. Apart from the Jebtsundamba Khutuktu, there were 13 other reincarnating high lamas, called 'seal-holding saints' (tamgatai khutuktu), in Outer Mongolia.


The Khoit Tsenkher Cave in Khovd Province shows lively pink, brown, and red ochre paintings (dated to 20,000 years ago) of mammoths, lynx, bactrian camels, and ostriches, earning it the nickname "the Lascaux of Mongolia". The venus figurines of Mal'ta (21,000 years ago) testify to the level of Upper Paleolithic art in northern Mongolia; Mal'ta is now part of Russia.
Neolithic agricultural settlements (c. 5500–3500 BC), such as those at Norovlin, Tamsagbulag, Bayanzag, and Rashaan Khad, predated the introduction of horse-riding nomadism, a pivotal event in the history of Mongolia which became the dominant culture. Horse-riding nomadism has been documented by archeological evidence in Mongolia during the Copper and Bronze Age Afanasevo culture (3500–2500 BC); this culture was active to the Khangai Mountains in Central Mongolia. The wheeled vehicles found in the burials of the Afanasevans have been dated to before 2200 BC. Pastoral nomadism and metalworking became more developed with the later Okunev culture (2nd millennium BC), Andronovo culture (2300–1000 BC) and Karasuk culture (1500–300 BC), culminating with the Iron Age Xiongnu Empire in 209 BC. Monuments of the pre-Xiongnu Bronze Age include deer stones, keregsur kurgans, square slab tombs, and rock paintings.
Although cultivation of crops has continued since the Neolithic, agriculture has always remained small in scale compared to pastoral nomadism. Agriculture may have first been introduced from the west or arose independently in the region. The population during the Copper Age has been described as mongoloid in the east of what is now Mongolia, and as europoid in the west. Tocharians (Yuezhi) and Scythians inhabited western Mongolia during the Bronze Age. The mummy of a Scythian warrior, which is believed to be about 2,500 years old, was a 30- to 40-year-old man with blond hair; it was found in the Altai, Mongolia. As equine nomadism was introduced into Mongolia, the political center of the Eurasian Steppe also shifted to Mongolia, where it remained until the 18th century CE. The intrusions of northern pastoralists (e.g. the Guifang, Shanrong, and Donghu) into China during the Shang dynasty (1600–1046 BC) and Zhou dynasty (1046–256 BC) presaged the age of nomadic empires.
Since prehistoric times, Mongolia has been inhabited by nomads who, from time to time, formed great confederations that rose to power and prominence. Common institutions were the office of the Khan, the Kurultai (Supreme Council), left and right wings, imperial army (Keshig) and the decimal military system. The first of these empires, the Xiongnu of undetermined ethnicity, were brought together by Modu Shanyu to form a confederation in 209 BC. Soon they emerged as the greatest threat to the Qin Dynasty, forcing the latter to construct the Great Wall of China. It was guarded by up to almost 300,000 soldiers during Marshal Meng Tian's tenure, as a means of defense against the destructive Xiongnu raids. The vast Xiongnu empire (209 BC–93 AD) was followed by the Mongolic Xianbei empire (93–234 AD), which also ruled more than the entirety of present-day Mongolia. The Mongolic Rouran Khaganate (330–555), of Xianbei provenance was the first to use "Khagan" as an imperial title. It ruled a massive empire before being defeated by the Göktürks (555–745) whose empire was even bigger.
The Göktürks laid siege to Panticapaeum, present-day Kerch, in 576. They were succeeded by the Uyghur Khaganate (745–840) who were defeated by the Kyrgyz. The Mongolic Khitans, descendants of the Xianbei, ruled Mongolia during the Liao Dynasty (907–1125), after which the Khamag Mongol (1125–1206) rose to prominence.
Lines 3–5 of the memorial inscription of Bilge Khagan (684–737) in central Mongolia summarizes the time of the Khagans:
 In battles they subdued the nations of all four sides of the world and suppressed them. They made those who had heads bow their heads, and who had knees genuflect them. In the east up to the Kadyrkhan common people, in the west up to the Iron Gate they conquered... These Khagans were wise. These Khagans were great. Their servants were wise and great too. Officials were honest and direct with people. They ruled the nation this way. This way they held sway over them. When they died ambassadors from Bokuli Cholug (Baekje Korea), Tabgach (Tang China), Tibet (Tibetan Empire), Avar (Avar Khaganate), Rome (Byzantine Empire), Kirgiz, Uch-Kurykan, Otuz-Tatars, Khitans, Tatabis came to the funerals. So many people came to mourn over the great Khagans. They were famous Khagans.


With the fall of the Qing dynasty in 1911, Mongolia under the Bogd Khaan declared its independence. But the newly established Republic of China considered Mongolia to be part of its own territory. Yuan Shikai, the President of the Republic of China, considered the new republic to be the successor of the Qing. Bogd Khaan said that both Mongolia and China had been administered by the Manchu during the Qing, and after the fall of the Qing dynasty in 1911, the contract of Mongolian submission to the Manchu had become invalid.
The area controlled by the Bogd Khaan was approximately that of the former Outer Mongolia during the Qing period. In 1919, after the October Revolution in Russia, Chinese troops led by warlord Xu Shuzheng occupied Mongolia. Warfare erupted on the northern border. As a result of the Russian Civil War, the White Russian Lieutenant General Baron Ungern led his troops into Mongolia in October 1920, defeating the Chinese forces in Niislel Khüree (now Ulaanbaatar) in early February 1921 with Mongol support.
To eliminate the threat posed by Ungern, Bolshevik Russia decided to support the establishment of a communist Mongolian government and army. This Mongolian army took the Mongolian part of Kyakhta from Chinese forces on 18 March 1921, and on 6 July, Russian and Mongolian troops arrived in Khüree. Mongolia declared its independence again on 11 July 1921. As a result, Mongolia was closely aligned with the Soviet Union over the next seven decades.


The February 1945 Yalta Conference provided for the Soviet Union's participation in the Pacific War. One of the Soviet conditions for its participation, put forward at Yalta, was that after the war Outer Mongolia would retain its independence. The referendum took place on 20 October 1945, with (according to official numbers) 100% of the electorate voting for independence.
After the establishment of the People's Republic of China, both countries confirmed their mutual recognition on 6 October 1949. However, the Republic of China used its Security Council veto in 1955, to stop the admission of the Mongolian People's Republic to the United Nations on the grounds it recognized all of Mongolia —including Outer Mongolia— as part of China. This was the only time the Republic of China ever used its veto. Hence, and because of the repeated threats to veto by the ROC, Mongolia did not join the UN until 1961 when the Soviet Union agreed to lift its veto on the admission of Mauritania (and any other newly independent African state), in return for the admission of Mongolia. Faced with pressure from nearly all the other African countries, the ROC relented under protest. Mongolia and Mauritania were both admitted to the UN on 27 October 1961. (see China and the United Nations)
On 26 January 1952, Yumjaagiin Tsedenbal took power in Mongolia after the death of Choibalsan. Tsedenbal was the leading political figure in Mongolia for more than 30 years. While Tsedenbal was visiting Moscow in August 1984, his severe illness prompted the parliament to announce his retirement and replace him with Jambyn Batmönkh.


April 6 – Dutch sailor Jan van Riebeeck establishes a resupply camp for the Dutch East India Company at the Cape of Good Hope in what is now South Africa, thus founding Cape Town.
May 18 – Rhode Island passes the first law in North America making slavery illegal.
May 19 (May 29, Gregorian calendar) – First Anglo-Dutch War: Battle of Dover – The opening battle is fought off Dover, between Lt.-Admiral Maarten Harpertszoon Tromp's 42 Dutch ships and 21 English ships divided into two squadrons, one commanded by Robert Blake and the other by Nehemiah Bourne; the result is inconclusive.
June 13 – George Fox preaches to a large crowd on Firbank Fell in England, leading to the establishment of the Religious Society of Friends (Quakers).


January 8 – Michiel de Ruyter marries the widow Anna van Gelder and plans retirement, but months later becomes a vice-commodore in the First Anglo-Dutch War.
February 4 – At Edinburgh, the parliamentary commissioners of the Commonwealth of England proclaim the Tender of Union to be in force in Scotland, annexing the Scottish nation with the concession that Scotland would have 30 representatives in the parliament of the English Commonwealth.
February 12 – Oliver Cromwell, England's Lord Protector, announces that his Council of Scotland will regulate church affairs as part of the Terms of Incorporation of Scotland into England, and eliminates Presbyterianism as Scotland's state religion.
March 29 – A total solar eclipse occurs on (Black Monday, or on 8 April New Style in the Gregorian calendar).


After the Japanese surrender to the Allies on 15 August 1945, Singapore fell into a brief state of violence and disorder; looting and revenge-killing were widespread. British, Australian, and Indian troops led by Lord Louis Mountbatten returned to Singapore to receive the formal surrender of Japanese forces in the region from General Seishirō Itagaki on behalf of General Hisaichi Terauchi on 12 September 1945. Meanwhile, Tomoyuki Yamashita was tried by a US military commission for war crimes, but not for crimes committed by his troops in Malaya or Singapore. He was convicted and hanged in the Philippines on 23 February 1946.
Much of Singapore's infrastructure had been destroyed during the war, including those needed to supply utilities. A shortage of food led to malnutrition, disease, and rampant crime and violence. A series of strikes in 1947 caused massive stoppages in public transport and other services. However, by late 1947 the economy began to recover, facilitated by a growing international demand for tin and rubber. The failure of Britain to successfully defend its colony against the Japanese changed its image in the eyes of Singaporeans. British Military Administration ended on 1 April 1946, with Singapore becoming a separate Crown Colony. In July 1947, separate Executive and Legislative Councils were established and the election of six members of the Legislative Council was scheduled in the following year.
During the 1950s, Chinese communists, with strong ties to the trade unions and Chinese schools, waged a guerrilla war against the government, leading to the Malayan Emergency. The 1954 National Service riots, Hock Lee bus riots, and Chinese middle schools riots in Singapore were all linked to these events. David Marshall, pro-independence leader of the Labour Front, won Singapore's first general election in 1955. He led a delegation to London, and Britain rejected his demand for complete self-rule. He resigned and was replaced by Lim Yew Hock in 1956, and after further negotiations Britain agreed to grant Singapore full internal self-government for all matters except defence and foreign affairs. During the subsequent May 1959 elections, the People's Action Party (PAP) won a landslide victory. Governor Sir William Allmond Codrington Goode served as the first Yang di-Pertuan Negara (Head of State).


Singapore (/ˈsɪŋ(ɡ)əpɔːr/ (listen)), officially the Republic of Singapore, is a sovereign island country and city-state in maritime Southeast Asia. It lies about one degree of latitude (137 kilometres or 85 miles) north of the equator, off the southern tip of the Malay Peninsula, bordering the Strait of Malacca to the west, the Singapore Strait to the south, the South China Sea to the east, and the Straits of Johor to the north. The country's territory is composed of one main island, 63 satellite islands and islets, and one outlying islet, the combined area of which has increased by 25% since the country's independence as a result of extensive land reclamation projects. It has the third highest population density in the world. With a multicultural population and recognising the need to respect cultural identities of the major ethnic groups within the nation, Singapore has four official languages: English, Malay, Mandarin, and Tamil. English is the lingua franca and numerous public services are available only in English. Multiracialism is enshrined in the constitution and continues to shape national policies in education, housing, and politics.
Singapore's history dates back at least a millennium, having been a maritime emporium known as Temasek and subsequently as a major constituent part of several successive thalassocratic empires. Its contemporary era began in 1819 when Stamford Raffles established Singapore as an entrepôt trading post of the British Empire. In 1867, the colonies in Southeast Asia were reorganised and Singapore came under the direct control of Britain as part of the Straits Settlements. During the Second World War, Singapore was occupied by Japan in 1942, and returned to British control as a separate crown colony following Japan's surrender in 1945. Singapore gained self-governance in 1959 and in 1963 became part of the new federation of Malaysia, alongside Malaya, North Borneo, and Sarawak. Ideological differences, most notably the perceived encroachment of the egalitarian "Malaysian Malaysia" political ideology led by Lee Kuan Yew into the other constituent entities of Malaysia—at the perceived expense of the bumiputera and the policies of Ketuanan Melayu—eventually led to Singapore's expulsion from the federation two years later; Singapore became an independent sovereign country in 1965.
After early years of turbulence whilst lacking natural resources and a hinterland, the nation rapidly developed to become one of the Four Asian Tigers based on international trade and economic globalisation, integrating itself within the world economy through free trade with minimal to no trade barriers or tariffs, export-oriented industrialisation, and the large accumulation of received foreign direct investments, foreign-exchange reserves, and assets held by sovereign wealth funds. A highly developed country, it is tied for 11th on the UN Human Development Index and has the second-highest GDP per capita (PPP) in the world. Identified as a tax haven, Singapore is the only country in Asia with a AAA sovereign credit rating from all major rating agencies. It is a major aviation, financial, and maritime shipping hub, and has consistently been ranked as one of the most expensive cities to live in for expatriates and foreign workers. Singapore is placed highly in key social indicators: education, healthcare, quality of life, personal safety, infrastructure, and housing, with a home-ownership rate of 88 percent. Singaporeans enjoy one of the longest life expectancies, fastest Internet connection speeds, lowest infant mortality rates, and lowest levels of corruption in the world.
Singapore is a unitary parliamentary republic with a Westminster system of unicameral parliamentary government, and its legal system is based on common law. Although the country is a multi-party democracy with free elections, the government under the People's Action Party (PAP) wields significant control and dominance over politics and society. The PAP has ruled the country continuously since full internal self-government was achieved in 1959, with 83 out of 104 seats in Parliament as of the 2020 election, the rest of the seats being held by the Workers' Party (WP) and the Progress Singapore Party (PSP). One of the five founding members of ASEAN, Singapore is also the headquarters of the Asia-Pacific Economic Cooperation (APEC) Secretariat, the Pacific Economic Cooperation Council (PECC) Secretariat, and is the host city of many international conferences and events. Singapore is also a member of the United Nations, World Trade Organization, East Asia Summit, Non-Aligned Movement, and the Commonwealth of Nations.


The British governor Stamford Raffles arrived in Singapore on 28 January 1819 and soon recognised the island as a natural choice for the new port. The island was then nominally ruled by Tengku Abdul Rahman, the Sultan of Johor, who was controlled by the Dutch and the Bugis. However, the Sultanate was weakened by factional division: Abdul Rahman, the Temenggong of Johor to Tengku Abdul Rahman, as well as his officials, were loyal to the Sultan's elder brother Tengku Long, who was living in exile in Penyengat Island, Riau Islands. With the Temenggong's help, Raffles managed to smuggle Tengku Long back into Singapore. Raffles offered to recognise Tengku Long as the rightful Sultan of Johor, under the title of Sultan Hussein, as well as provide him with a yearly payment of $5000 and another $3000 to the Temenggong; in return, Sultan Hussein would grant the British the right to establish a trading post on Singapore. A formal treaty was signed on 6 February 1819.
In 1824, a further treaty with the Sultan led to the entire island becoming a British possession. In 1826, Singapore became part of the Straits Settlements, then under the jurisdiction of British India. Singapore became the regional capital in 1836. Prior to Raffles' arrival, there were only about a thousand people living on the island, mostly indigenous Malays along with a handful of Chinese. By 1860 the population had swelled to over 80,000, more than half being Chinese. Many of these early immigrants came to work on the pepper and gambier plantations. In 1867, the Straits Settlements were separated from British India, coming under the direct control of Britain. Later, in the 1890s, when the rubber industry became established in Malaya and Singapore, the island became a global centre for rubber sorting and export.
Singapore was not greatly affected by the First World War (1914–18), as the conflict did not spread to Southeast Asia. The only significant event during the war was the 1915 Singapore Mutiny by Muslim sepoys from British India, who were garrisoned in Singapore. After hearing rumours that they were to be sent to fight the Ottoman Empire, a Muslim state, the soldiers rebelled, killing their officers and several British civilians before the mutiny was suppressed by non-Muslim troops arriving from Johore and Burma.
After World War I, the British built the large Singapore Naval Base as part of the defensive Singapore strategy. Originally announced in 1921, the construction of the base proceeded at a slow pace until the Japanese invasion of Manchuria in 1931. Costing $60 million and not fully completed in 1938, it was nonetheless the largest dry dock in the world, the third-largest floating dock, and had enough fuel tanks to support the entire British navy for six months. The base was defended by heavy 15-inch (380 mm) naval guns stationed at Fort Siloso, Fort Canning and Labrador, as well as a Royal Air Force airfield at Tengah Air Base. Winston Churchill touted it as the "Gibraltar of the East", and military discussions often referred to the base as simply "East of Suez". However, the British Home Fleet was stationed in Europe, and the British could not afford to build a second fleet to protect their interests in Asia. The plan was for the Home Fleet to sail quickly to Singapore in the event of an emergency. As a consequence, after World War II broke out in 1939, the fleet was fully occupied with defending Britain, leaving Singapore vulnerable to Japanese invasion.


PAP leaders believed that Singapore's future lay with Malaya, due to strong ties between the two. It was thought that reuniting with Malaya would benefit the economy by creating a common market, alleviating ongoing unemployment woes in Singapore. However, a sizeable pro-communist wing of the PAP was strongly opposed to the merger, fearing a loss of influence, and hence formed the Barisan Sosialis, splitting from the PAP. The ruling party of Malaya, United Malays National Organisation (UMNO), was staunchly anti-communist, and it was suspected UMNO would support the non-communist factions of PAP. UMNO, initially sceptical of the idea of a merger due to distrust of the PAP government and concern that the large ethnic Chinese population in Singapore would alter the racial balance in Malaya on which their political power base depended, became supportive of the idea of the merger due to joint fear of a communist takeover.
On 27 May 1961, Malaya's prime minister, Tunku Abdul Rahman, made a surprise proposal for a new Federation called Malaysia, which would unite the current and former British possessions in the region: the Federation of Malaya, Singapore, Brunei, North Borneo, and Sarawak. UMNO leaders believed that the additional Malay population in the Bornean territories would balance Singapore's Chinese population. The British government, for its part, believed that the merger would prevent Singapore from becoming a haven for communism. To obtain a mandate for a merger, the PAP held a referendum on the merger. This referendum included a choice of different terms for a merger with Malaysia and had no option for avoiding merger altogether. On 16 September 1963, Singapore joined with Malaya, the North Borneo, and Sarawak to form the new Federation of Malaysia under the terms of the Malaysia Agreement. Under this Agreement, Singapore had a relatively high level of autonomy compared to the other states of Malaysia.
Indonesia opposed the formation of Malaysia due to its own claims over Borneo and launched Konfrontasi (Confrontation in Indonesian) in response to the formation of Malaysia. On 10 March 1965, a bomb planted by Indonesian saboteurs on a mezzanine floor of MacDonald House exploded, killing three people and injuring 33 others. It was the deadliest of at least 42 bomb incidents which occurred during the confrontation. Two members of the Indonesian Marine Corps, Osman bin Haji Mohamed Ali and Harun bin Said, were eventually convicted and executed for the crime. The explosion caused US$250,000 (equivalent to US$2,149,683 in 2021) in damages to MacDonald House.
Even after the merger, the Singaporean government and the Malaysian central government disagreed on many political and economic issues. Despite an agreement to establish a common market, Singapore continued to face restrictions when trading with the rest of Malaysia. In retaliation, Singapore did not extend to Sabah and Sarawak the full extent of the loans agreed to for economic development of the two eastern states. Talks soon broke down, and abusive speeches and writing became rife on both sides. This led to communal strife in Singapore, culminating in the 1964 race riots. On 7 August 1965, Malaysian prime minister Tunku Abdul Rahman, seeing no alternative to avoid further bloodshed, advised the Parliament of Malaysia that it should vote to expel Singapore from Malaysia. On 9 August 1965, the Malaysian Parliament voted 126 to 0 to move a bill to amend the constitution, expelling Singapore from Malaysia, which left Singapore as a newly independent country.


During the Pacific War, the Japanese invasion of Malaya culminated in the Battle of Singapore. When the British force of 60,000 troops surrendered on 15 February 1942, British prime minister Winston Churchill called the defeat "the worst disaster and largest capitulation in British history". British and Empire losses during the fighting for Singapore were heavy, with a total of nearly 85,000 personnel captured. About 5,000 were killed or wounded, of which Australians made up the majority. Japanese casualties during the fighting in Singapore amounted to 1,714 killed and 3,378 wounded. The occupation was to become a major turning point in the histories of several nations, including those of Japan, Britain, and Singapore. Japanese newspapers triumphantly declared the victory as deciding the general situation of the war. Between 5,000 and 25,000 ethnic Chinese people were killed in the subsequent Sook Ching massacre. British forces had planned to liberate Singapore in 1945; however, the war ended before these operations could be carried out.


April 7 – Former British Prime Minister William Pitt, delivers his last speech to Parliament, and speaks to the House of Lords "passionately but incoherently against the granting of independence" to the American colonies, but collapses during the debate, and dies five weeks later.
April 12 – King George III appoints the five-member Carlisle Peace Commission to present peace terms to negotiate an end to the rebellion of Britain's 13 American colonies.
April 30 – The 1,800 feet (550 m) long Hudson River Chain, designed to prevent British ships from moving up the river toward West Point, New York is stretched across the river and anchored by an engineering team under the direction of Captain Thomas Machin.
May 12 – Heinrich XI, Prince Reuss of Greiz is elevated to Prince of the Principality of Reuss-Greiz by Joseph II, Holy Roman Emperor – it is during Heinrich XI's rule in 1778, that the first appearance of the national colors of modern Germany are present on a flag that closely resembles the modern Flag of Germany, to occur anywhere within what today comprises Germany.
May 30 – Benedict Arnold signs the U.S. Oath of Allegiance at Valley Forge.
June 24 – A total solar eclipse takes place across parts of North America, from Texas to Virginia.
June 28 – American Revolutionary War – Battle of Monmouth: George Washington's Continental Army battles British general Sir Henry Clinton's army to a draw, near Monmouth County, New Jersey.
June – The Anglo-French War (1778–83) begins.


1778 (MDCCLXXVIII) was a common year starting on Thursday of the Gregorian calendar and a common year starting on Monday of the Julian calendar, the 1778th year of the Common Era (CE) and Anno Domini (AD) designations, the 778th  year of the 2nd millennium, the 78th  year of the 18th century, and the  9th   year of the 1770s decade. As of the start of 1778, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.


Hainan, separated by the 20 km (12 mi) wide Qiongzhou Strait from the Leizhou Peninsula of Guangdong, is the largest island administered by the People's Republic of China and the 42nd largest in the world. The area of Hainan Island (32,900 km² (12,700 sq mi), 97% of the province) is similar to that of Belgium or slightly smaller than that of Taiwan. To the west of Hainan Island is the Gulf of Tonkin. Wuzhi Mountain is the highest mountain on the island at 1,840 m (6,040 ft).
Hainan Island measures 288 km (179 mi) long and 180 km (110 mi) wide.
The northern half of Hainan is covered with the ancient Hainan Volcanic Field. Beneath the topsoil is volcanic rock while the topsoil itself contains small pieces of this vesicular rock.
Wetland covers 320,000 hectares, 78,000 hectares of which were created artificially. Most of this is located in the eastern and northern part of Hainan.


Hainan Island was recorded by Chinese mandarin officials in 110 BC, when the Han dynasty of China established a military garrison there following the arrival of General Lu Bode. In 46 BC the Han court decided that the conquest was too expensive and abandoned the island. Han Chinese people together with military personnel and officials began to migrate to Hainan Island from the mainland. Among them were the offspring of those who were banished to Hainan for political reasons.


Hainan was originally attached to the Northeastern part of what is now Vietnam; however, the island was formed after it physically broke away from Vietnam due to a volcanic eruption and drifted southeast near China after the Mesozoic, millions of years ago.
The Baiyue people are among the earliest Kra-Dai residents to arrive on Hainan island. They are believed to have settled there at least 2 to 6 thousand years ago, and carry genetic markers from ancient people who reached the island between 7 and 27 thousand years ago.


Most of the rivers in Hainan originate in the central area of the island and flow radially in different directions. The Nandu River in the northern part of the island is 314 km (195 mi) long, and its tributary, the Xinwu River, is 109 km (68 mi) long. Other major rivers include the Wanquan River at 162 km (101 mi)-long in the east, Changhua River in the west, and the Sanya River in the south. Evaporation during the dry season around the coastal areas greatly reduces the flow of the rivers.
There are very few natural lakes in Hainan. However, there are numerous reservoirs, the largest of which is the Songtao Reservoir in the central-north area.


The government of India, which has the unilateral powers to change the borders of a state, divided Assam into several states beginning in 1970 within the borders of what was then Assam. In 1963, the Naga Hills district became the 16th state of India under the name of Nagaland. Part of Tuensang was added to Nagaland. In 1970, in response to the demands of the Khasi, Jaintia and Garo people of the Meghalaya Plateau, the districts containing the Khasi Hills, Jaintia Hills, and Garo Hills were formed into an autonomous state within Assam; in 1972 this became a separate state under the name of Meghalaya. In 1972, Arunachal Pradesh (the North East Frontier Agency) and Mizoram (from the Mizo Hills in the south) were separated from Assam as union territories; both became states in 1986.
Since the restructuring of Assam after independence, communal tensions and violence remain. Separatist groups began forming along ethnic lines, and demands for autonomy and sovereignty grew, resulting in the fragmentation of Assam. In 1961, the government of Assam passed legislation making use of the Assamese language compulsory. It was withdrawn later under pressure from Bengali speaking people in Cachar. In the 1980s the Brahmaputra valley saw a six-year Assam Agitation triggered by the discovery of a sudden rise in registered voters on electoral rolls. It tried to force the government to identify and deport foreigners illegally migrating from neighbouring Bangladesh and to provide constitutional, legislative, administrative and cultural safeguards for the indigenous Assamese majority, which they felt was under threat due to the increase of migration from Bangladesh. The agitation ended after an accord (Assam Accord 1985) between its leaders and the Union Government, which remained unimplemented, causing simmering discontent.
The post 1970s experienced the growth of armed separatist groups such as the United Liberation Front of Asom (ULFA) and the National Democratic Front of Bodoland (NDFB). In November 1990, the Government of India deployed the Indian army, after which low-intensity military conflicts and political homicides have been continuing for more than a decade. In recent times, ethnically based militant groups have grown. The Panchayati Raj Act has been applied in Assam, after agitation of the communities due to the sluggish rate of development and general apathy of successive state governments towards Indigenous Assamese communities.
Deadly floods hit the state in 2020 and 2022.


Assam and adjoining regions have evidences of human settlement from the beginning of the Stone Age. The hills at the height of 1,500 to 2,000 feet (460–615 m) were popular habitats probably due to availability of exposed dolerite basalt, useful for tool-making.Ambari site in Guwahati has revealed Shunga-Kushana era artefacts including flight of stairs and a water tank which may date from 1st century BCE and may be 2,000 years old. Experts speculate that another significant find at Ambari is Roman era Roman roulette pottery from the 2nd century BCE.


On 1 September 1939, Germany invaded Poland after having staged several false flag border incidents as a pretext to initiate the invasion. The first German attack of the war came against the Polish defenses at Westerplatte. The United Kingdom responded with an ultimatum to Germany to cease military operations, and on 3 September, after the ultimatum was ignored, Britain and France declared war on Germany, followed by Australia, New Zealand, South Africa and Canada. During the Phoney War period, the alliance provided no direct military support to Poland, outside of a cautious French probe into the Saarland. The Western Allies also began a naval blockade of Germany, which aimed to damage the country's economy and the war effort. Germany responded by ordering U-boat warfare against Allied merchant and warships, which would later escalate into the Battle of the Atlantic.
On 8 September, German troops reached the suburbs of Warsaw. The Polish counter offensive to the west halted the German advance for several days, but it was outflanked and encircled by the Wehrmacht. Remnants of the Polish army broke through to besieged Warsaw. On 17 September 1939, two days after signing a cease-fire with Japan, the Soviet Union invaded Poland under the pretext that the Polish state had ostensibly ceased to exist. On 27 September, the Warsaw garrison surrendered to the Germans, and the last large operational unit of the Polish Army surrendered on 6 October. Despite the military defeat, Poland never surrendered; instead, it formed the Polish government-in-exile and a clandestine state apparatus remained in occupied Poland. A significant part of Polish military personnel evacuated to Romania and Latvia; many of them later fought against the Axis in other theatres of the war.
Germany annexed the western and occupied the central part of Poland, and the Soviet Union annexed its eastern part; small shares of Polish territory were transferred to Lithuania and Slovakia. On 6 October, Hitler made a public peace overture to the United Kingdom and France but said that the future of Poland was to be determined exclusively by Germany and the Soviet Union. The proposal was rejected, and Hitler ordered an immediate offensive against France, which was postponed until the spring of 1940 due to bad weather.
After the outbreak of war in Poland, Stalin threatened Estonia, Latvia and Lithuania with military invasion, forcing the three Baltic countries to sign pacts that stipulated the creation of Soviet military bases in these countries. In October 1939, significant Soviet military contingents were moved there. Finland refused to sign a similar pact and rejected ceding part of its territory to the Soviet Union. The Soviet Union invaded Finland in November 1939, and the Soviet Union was expelled from the League of Nations. Despite overwhelming numerical superiority, Soviet military success during the Winter War was modest, and the Finno-Soviet war ended in March 1940 with some Finnish concessions of territory.
In June 1940, the Soviet Union occupied the entire territories of Estonia, Latvia and Lithuania, and the Romanian regions of Bessarabia, Northern Bukovina and the Hertsa region. In August 1940, with German and Italian support, Hungary demanded Transylvania from Romania, through German arbitration Hungary would only receive Northern Transylvania leading to the Second Vienna Award, also known as the Vienna Diktat, a region with ethnic Romanian majority. In September 1940, Bulgaria demanded Southern Dobruja from Romania with German and Italian support, leading to the Treaty of Craiova. The loss of one-third of Romania's 1939 territory caused a coup against King Carol II, turning Romania into a fascist dictatorship under Marshal Ion Antonescu with a course set firmly towards the Axis in the hopes of a German guarantee. Meanwhile, Nazi-Soviet political rapprochement and economic co-operation gradually stalled, and both states began preparations for war.


World War II or the Second World War, often abbreviated as WWII or WW2, was a global war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing military alliances: the Allies and the Axis powers. In a total war directly involving more than 100 million personnel from more than 30 countries, the major participants threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. Aircraft played a major role in the conflict, enabling the strategic bombing of population centres and the only two uses of nuclear weapons in war. World War II was by far the deadliest conflict in human history; it resulted in 70 to 85 million fatalities, a majority being civilians. Tens of millions of people died due to genocides (including the Holocaust), starvation, massacres, and disease.  In the wake of the Axis defeat, Germany and Japan were occupied, and war crimes tribunals were conducted against German and Japanese leaders.
The exact causes of World War II are debated, but contributing factors included the Second Italo-Ethiopian War, the Spanish Civil War, the Second Sino-Japanese War, the Soviet–Japanese border conflicts, the rise of fascism in Europe and rising European tensions since World War I. World War II is generally considered to have begun on 1 September 1939, when Nazi Germany, under Adolf Hitler, invaded Poland. The United Kingdom and France subsequently declared war on Germany on 3 September. Under the Molotov–Ribbentrop Pact of August 1939, Germany and the Soviet Union had partitioned Poland and marked out their "spheres of influence" across Finland, Estonia, Latvia, Lithuania and Romania. From late 1939 to early 1941, in a series of campaigns and treaties, Germany conquered or controlled much of continental Europe, and formed the Axis alliance with Italy and Japan (along with other countries later on). Following the onset of campaigns in North Africa and East Africa, and the fall of France in mid-1940, the war continued primarily between the European Axis powers and the British Empire, with war in the Balkans, the aerial Battle of Britain, the Blitz of the UK, and the Battle of the Atlantic. On 22 June 1941, Germany led the European Axis powers in an invasion of the Soviet Union, opening the Eastern Front, the largest land theatre of war in history.
Japan, which aimed to dominate Asia and the Pacific, was at war with the Republic of China by 1937. In December 1941, Japan attacked American and British territories with near-simultaneous offensives against Southeast Asia and the Central Pacific, including an attack on the US fleet at Pearl Harbor which resulted in the United States declaring war against Japan. Therefore, the European Axis powers declared war on the United States in solidarity. Japan soon captured much of the western Pacific, but its advances were halted in 1942 after losing the critical Battle of Midway; later, Germany and Italy were defeated in North Africa and at Stalingrad in the Soviet Union. Key setbacks in 1943—including a series of German defeats on the Eastern Front, the Allied invasions of Sicily and the Italian mainland, and Allied offensives in the Pacific—cost the Axis powers their initiative and forced them into strategic retreat on all fronts. In 1944, the Western Allies invaded German-occupied France, while the Soviet Union regained its territorial losses and turned towards Germany and its allies. During 1944 and 1945, Japan suffered reversals in mainland Asia, while the Allies crippled the Japanese Navy and captured key western Pacific islands.
The war in Europe concluded with the liberation of German-occupied territories, and the invasion of Germany by the Western Allies and the Soviet Union, culminating in the fall of Berlin to Soviet troops, Hitler's suicide and the German unconditional surrender on 9 May 1945. Following the Potsdam Declaration by the Allies on 26 July 1945 and the refusal of Japan to surrender on its terms, the United States dropped the first atomic bombs on the Japanese cities of Hiroshima, on 6 August, and Nagasaki, on 9 August. Faced with an imminent invasion of the Japanese archipelago, the possibility of additional atomic bombings, and the Soviet's declared entry into the war against Japan on the eve of invading Manchuria, Japan announced on 15 August its intention to surrender, then signed the surrender document on 2 September 1945, cementing total victory in Asia for the Allies.
World War II changed the political alignment and social structure of the globe. The United Nations (UN) was established to foster international co-operation and prevent future conflicts, with the victorious great powers—China, France, the Soviet Union, the United Kingdom, and the United States—becoming the permanent members of its Security Council. The Soviet Union and the United States emerged as rival superpowers, setting the stage for the nearly half-century-long Cold War. In the wake of European devastation, the influence of its great powers waned, triggering the decolonisation of Africa and Asia. Most countries whose industries had been damaged moved towards economic recovery and expansion. Political and economic integration, especially in Europe, began as an effort to forestall future hostilities, end pre-war enmities and forge a sense of common identity.


World War I had radically altered the political European map, with the defeat of the Central Powers—including Austria-Hungary, Germany, Bulgaria and the Ottoman Empire—and the 1917 Bolshevik seizure of power in Russia, which led to the founding of the Soviet Union. Meanwhile, the victorious Allies of World War I, such as France, Belgium, Italy, Romania, and Greece, gained territory, and new nation-states were created out of the collapse of Austria-Hungary and the Ottoman and Russian Empires.
To prevent a future world war, the League of Nations was created during the 1919 Paris Peace Conference. The organisation's primary goals were to prevent armed conflict through collective security, military and naval disarmament, and settling international disputes through peaceful negotiations and arbitration.
Despite strong pacifist sentiment after World War I, irredentist and revanchist nationalism emerged in several European states in the same period. These sentiments were especially marked in Germany because of the significant territorial, colonial, and financial losses imposed by the Treaty of Versailles. Under the treaty, Germany lost around 13 percent of its home territory and all its overseas possessions, while German annexation of other states was prohibited, reparations were imposed, and limits were placed on the size and capability of the country's armed forces.
The German Empire was dissolved in the German Revolution of 1918–1919, and a democratic government, later known as the Weimar Republic, was created. The interwar period saw strife between supporters of the new republic and hardline opponents on both the right and left. Italy, as an Entente ally, had made some post-war territorial gains; however, Italian nationalists were angered that the promises made by the United Kingdom and France to secure Italian entrance into the war were not fulfilled in the peace settlement. From 1922 to 1925, the Fascist movement led by Benito Mussolini seized power in Italy with a nationalist, totalitarian, and class collaborationist agenda that abolished representative democracy, repressed socialist, left-wing and liberal forces, and pursued an aggressive expansionist foreign policy aimed at making Italy a world power, and promising the creation of a "New Roman Empire".
Adolf Hitler, after an unsuccessful attempt to overthrow the German government in 1923, eventually became the Chancellor of Germany in 1933 when Paul Von Hindenburg and the Reichstag appointed him. He abolished democracy, espousing a radical, racially motivated revision of the world order, and soon began a massive rearmament campaign. Meanwhile, France, to secure its alliance, allowed Italy a free hand in Ethiopia, which Italy desired as a colonial possession. The situation was aggravated in early 1935 when the Territory of the Saar Basin was legally reunited with Germany, and Hitler repudiated the Treaty of Versailles, accelerated his rearmament programme, and introduced conscription.
The United Kingdom, France and Italy formed the Stresa Front in April 1935 in order to contain Germany, a key step towards military globalisation; however, that June, the United Kingdom made an independent naval agreement with Germany, easing prior restrictions. The Soviet Union, concerned by Germany's goals of capturing vast areas of Eastern Europe, drafted a treaty of mutual assistance with France. Before taking effect, though, the Franco-Soviet pact was required to go through the bureaucracy of the League of Nations, which rendered it essentially toothless. The United States, concerned with events in Europe and Asia, passed the Neutrality Act in August of the same year.
Hitler defied the Versailles and Locarno treaties by remilitarising the Rhineland in March 1936, encountering little opposition due to the policy of appeasement. In October 1936, Germany and Italy formed the Rome–Berlin Axis. A month later, Germany and Japan signed the Anti-Comintern Pact, which Italy joined the following year.


November 1 – Nuclear testing and Operation Ivy: The United States successfully detonates the first hydrogen bomb, codenamed "Mike", at Eniwetok Atoll in the Marshall Islands in the central Pacific Ocean, with a yield of 10.4 megatons.
November 4
The 9.0 Mw Severo-Kurilsk earthquake hits the Kamchatka Peninsula of the Soviet Union with a maximum Mercalli intensity of XI (Extreme). A tsunami took the lives of more than 2,300 people.
1952 United States presidential election: Republican General Dwight D. Eisenhower defeats Democratic Governor of Illinois Adlai Stevenson (correctly predicted by the UNIVAC computer).
The U.S. National Security Agency is founded.
Pace-Finletter MOU 1952: A Memorandum of understanding is signed between "...Air Force Secretary Finletter and Army Secretary Pace that established a fixed wing weight limit [for the Army] of five thousand pounds empty, but weight restrictions on helicopters were eliminated..."
November 18 – Jomo Kenyatta is arrested in Kenya, for an alleged connection to the Mau Mau Uprising.
November 20
The first official passenger flight over the North Pole is made, from Los Angeles to Copenhagen.
The first successful sex reassignment surgery is performed in Copenhagen, making George Jorgensen Jr. become Christine Jorgensen.
November 29 – Korean War: U.S. President-elect Dwight D. Eisenhower fulfills a political campaign promise, by traveling to Korea to find out what can be done to end the conflict.


September 2 – Dr. C. Walton Lillehei and Dr. F. John Lewis perform the first open-heart surgery, at the University of Minnesota.
September 6 – The CBC in Montreal, Quebec, goes on air launching television in Canada.
September 10 – The European Parliamentary Assembly (from March 1962, the European Parliament) opens.
September 15 – The United Nations cedes Eritrea to Ethiopia.
September 18 – The Soviet Union vetoes Japan's application for membership in the United Nations.
September 30 – The Revised Standard Version of the Bible is published.
October 14 – The United Nations begins work in the new United Nations building in New York City, designed by Le Corbusier and Oscar Niemeyer.
October 17 – 17 October affair: Indonesian troops led by General Nasution surround the presidential palace, seeking the dismissal of the People's Representative Council; Sukarno avoids confrontation.
October 19 – Alain Bombard begins to sail from the Canary Islands to Barbados in 65 days; he reaches them December 23.
October 20 – Martial law is declared in Kenya, in the face of the Mau Mau uprising.


July 13 – East Germany announces the formation of its National People's Army.
July 19 – August 3 – The 1952 Summer Olympics are held in Helsinki, Finland.
July 21 – The 7.3 Mw Kern County earthquake strikes California's southern Central Valley with a maximum Mercalli intensity of XI (Extreme), killing 12 and injuring hundreds.
July 23
The European Coal and Steel Community is established.
General Mohammed Naguib leads The Free Officers (formed by Gamal Abdel Nasser – the real power behind the coup) in the overthrow of King Farouk of Egypt.
July 25 – Puerto Rico becomes a self-governing commonwealth of the United States.
July 26 – King Farouk of Egypt abdicates in favour of Fuad II.
August 5 – The Treaty of Taipei between Japan and the Republic of China goes into effect, to officially end the Second Sino-Japanese War.
August 11 – The Jordanian Parliament forces King Talal of Jordan to abdicate due to mental illness; he is succeeded by his son King Hussein.
August 12 – Night of the Murdered Poets: 13 Soviet Jewish poets are executed.
August 13 – Japan joins the IMF.
August 14 – West Germany joins the IMF and the World Bank.
August 16 – Lynmouth, North Devon, England is devastated by floods; 34 die.
August 22 – The most damaging shock of the 1952 Kern County earthquake sequence strikes with a moment magnitude of 5.8, and a maximum Mercalli intensity of VIII (Severe). This event damages several hundred buildings in Bakersfield, California, with total additional losses of $10 million, with two associated deaths and some injuries.
August 26 – A British passenger jet makes a return crossing of the Atlantic Ocean in the same day.
August 27 – Reparation negotiations between West Germany and Israel end in Luxembourg: Germany will pay 3 billion Deutsche Marks.
August 29 – Composer John Cage's 4′33″, during which the performer does not play, premieres in Woodstock, New York.
August 30 – The last Finnish war reparations are sent to the Soviet Union.
August 31 – The Grenzlandring racetrack closes in Wegberg, Germany.


October 7 – William II becomes King of the Netherlands.
October 8 – A firman (imperial decree) of Sultan Abdulmejid I replaces Bashir Shihab II as Emir of Mount Lebanon with Prince Bashir Chehab III (Bashir Qasim al-Chehab).
October 11 – Maronite leader Bashir Shihab II surrenders to the Ottomans, and on October 14 goes into exile, initially in Malta.
November 4 – U.S. presidential election, 1840: William Henry Harrison defeats Martin Van Buren in a landslide.
December 7 – David Livingstone leaves Britain for Africa.
December 15 – The body of Napoleon is laid to rest in Les Invalides in Paris.
December 21 – Stockport Viaduct is completed in North West England. It is one of the largest brick structures in Europe.


July 4 – The Cunard Line's 700-ton wooden paddlewheel steamer RMS Britannia departs from Liverpool, bound for Halifax, Nova Scotia, on the first steam transatlantic passenger mail service.
July 15 – The Austrian Empire, the United Kingdom, the Kingdom of Prussia, and the Russian Empire sign the Convention of London with the Sublime Porte, ruler of the Ottoman Empire.
July 21 – August Borsig's steam locomotive, the first built in Germany, competes against a Stephenson-built locomotive on the Berlin–Jüterbog railroad; the Borsig locomotive wins by 10 minutes.
July 23
Pedro II is declared "of age" prematurely, and begins to reassert central control in Brazil.
The Province of Canada is created by the Act of Union.
August 1 – The Slavery Abolition Act ends the slave trade in the United Kingdom.
August 10 – Fortsas hoax: A number of book collectors gather in Binche, Belgium, to attend a non-existent book auction of the late Count of Fortsas.
September 10 – Ottoman and British troops bombard Beirut, and land troops on the coast, to pressure Egyptian Muhammad Ali to retreat from the country.
September 16 – Joseph Strutt hands over the deeds and papers concerning the Derby Arboretum, which is to become England's first public park.
September 30 – The frigate Belle-Poule arrives in Cherbourg, bringing back the remains of Napoleon from Saint Helena to France.


April – The Raleigh and Gaston Railroad is completed from Raleigh to near Weldon, North Carolina.
April 2 – The Washingtonian movement for teetotalism is founded by a group of alcoholics in Baltimore, Maryland.
April 3 – Johnny Appleseed meets Abraham Lincoln, and plants apple trees in New York City.
April 15 – King's College Hospital opens in London.
May 1 – Britain issues the Penny Black, the world's first postage stamp; it becomes valid for the pre-payment of postage from May 6.
May 7 – Great Natchez Tornado: A massive tornado strikes Natchez, Mississippi during the early afternoon. Before it is over, 317 people are killed and 109 injured (the second deadliest tornado in U.S. history).
May 21 – New Zealand is declared a British colony.
June 7 – On the death of Frederick William III of Prussia, he is succeeded on the throne of the Kingdom of Prussia (which he has ruled for more than 40 years) by his eldest son Frederick William IV.
June 12–23 – The World Anti-Slavery Convention is organised by the British and Foreign Anti-Slavery Society, at Exeter Hall in London, England. Arguments over the exclusion of women from the convention have important ramifications for the movement for women's suffrage in the United States.


1840 (MDCCCXL) was a leap year starting on Wednesday of the Gregorian calendar and a leap year starting on Monday of the Julian calendar, the 1840th year of the Common Era (CE) and Anno Domini (AD) designations, the 840th  year of the 2nd millennium, the 40th  year of the 19th century, and the  1st   year of the 1840s decade. As of the start of 1840, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.


As communist and anti-colonial ideologies spread out across Africa, many clandestine political movements were established in support of Mozambican independence. These movements claimed that since policies and development plans were primarily designed by the ruling authorities for the benefit of Mozambique's Portuguese population, little attention was paid to Mozambique's tribal integration and the development of its native communities.
According to the official guerrilla statements, this affected a majority of the indigenous population who suffered both state-sponsored discrimination and enormous social pressure. Many felt they had received too little opportunity or resources to upgrade their skills and improve their economic and social situation to a degree comparable to that of the Europeans. Statistically, Mozambique's Portuguese whites were indeed wealthier and more skilled than the black indigenous majority. As a response to the guerrilla movement, the Portuguese government from the 1960s and principally the early 1970s initiated gradual changes with new socioeconomic developments and egalitarian policies.
The Front for the Liberation of Mozambique (FRELIMO) initiated a guerrilla campaign against Portuguese rule in September 1964. This conflict—along with the two others already initiated in the other Portuguese colonies of Angola and Portuguese Guinea—became part of the so-called Portuguese Colonial War (1961–1974). From a military standpoint, the Portuguese regular army maintained control of the population centres while the guerrilla forces sought to undermine their influence in rural and tribal areas in the north and west. As part of their response to FRELIMO, the Portuguese government began to pay more attention to creating favourable conditions for social development and economic growth.


The new government under President Samora Machel established a one-party state based on Marxist principles. It received diplomatic and some military support from Cuba and the Soviet Union and proceeded to crack down on opposition. Starting shortly after independence, the country was plagued from 1977 to 1992 by a long and violent civil war between the opposition forces of anti-communist Mozambican National Resistance (RENAMO) rebel militias and the FRELIMO regime. This conflict characterised the first decades of Mozambican independence, combined with sabotage from the neighbouring states of Rhodesia and South Africa, ineffective policies, failed central planning, and the resulting economic collapse. This period was also marked by the exodus of Portuguese nationals and Mozambicans of Portuguese heritage, a collapsed infrastructure, lack of investment in productive assets, and government nationalisation of privately owned industries, as well as widespread famine.
During most of the civil war, the FRELIMO-formed central government was unable to exercise effective control outside of urban areas, many of which were cut off from the capital. RENAMO-controlled areas included up to 50% of the rural areas in several provinces, and it is reported that health services of any kind were isolated from assistance for years in those areas. The problem worsened when the government cut back spending on health care. The war was marked by mass human rights violations from both sides of the conflict, with both RENAMO and FRELIMO contributing to the chaos through the use of terror and indiscriminate targeting of civilians. The central government executed tens of thousands of people while trying to extend its control throughout the country and sent many people to "re-education camps" where thousands died.
During the war, RENAMO proposed a peace agreement based on the secession of RENAMO-controlled northern and western territories as the independent Republic of Rombesia, but FRELIMO refused, insisting on the undivided sovereignty of the entire country. An estimated one million Mozambicans perished during the civil war, 1.7 million took refuge in neighbouring states, and several million more were internally displaced. The FRELIMO regime also gave shelter and support to South African (African National Congress) and Zimbabwean (Zimbabwe African National Union) rebel movements, while the governments of Rhodesia and later Apartheid South Africa backed RENAMO in the civil war. Between 300,000 and 600,000 people died of famine during the war.
On 19 October 1986, Machel was on his way back from an international meeting in Zambia in the presidential Tupolev Tu-134 aircraft when the plane crashed in the Lebombo Mountains near Mbuzini in the Mpumalanga region of apartheid-ruling South Africa. There were ten survivors, but President Machel and thirty-three others died, including ministers and officials of the Mozambique government. The United Nations' Soviet delegation issued a minority report contending that their expertise and experience had been undermined by the South Africans. Representatives of the Soviet Union advanced the theory that the plane had been intentionally diverted by a false navigational beacon signal, using a technology provided by military intelligence operatives of the South African government.
Machel's successor Joaquim Chissano implemented sweeping changes in the country, starting reforms such as changing from Marxism to capitalism and began peace talks with RENAMO. The new constitution enacted in 1990 provided for a multi-party political system, market-based economy, and free elections. The civil war ended in October 1992 with the Rome General Peace Accords, first brokered by the Christian Council of Mozambique (Council of Protestant Churches) and then taken over by Community of Sant'Egidio. Peace returned to Mozambique, under the supervision of the peacekeeping force of the United Nations.


From the late first millennium AD, vast Indian Ocean trade networks extended as far south into Mozambique as evidenced by the ancient port town of Chibuene. Beginning in the 9th century, a growing involvement in Indian Ocean trade led to the development of numerous port towns along the entire East African coast, including modern day Mozambique. Largely autonomous, these towns broadly participated in the incipient Swahili culture. Islam was often adopted by urban elites, facilitating trade. In Mozambique, Sofala, Angoche, and Mozambique Island were regional powers by the 15th century.
The towns traded with merchants from both the African interior and the broader Indian Ocean world. Particularly important were the gold and ivory caravan routes. Inland states like the Kingdom of Zimbabwe and Kingdom of Mutapa provided the coveted gold and ivory, which were then exchanged up the coast to larger port cities like Kilwa and Mombasa.


The country was named Moçambique by the Portuguese after the Island of Mozambique, derived from Mussa Bin Bique or Musa Al Big or Mossa Al Bique or Mussa Ben Mbiki or Mussa Ibn Malik, an Arab trader who first visited the island and later lived there. The island-town was the capital of the Portuguese colony until 1898, when it was moved south to Lourenço Marques (now Maputo).


January 4
A. E. Coppard, English short story writer and poet (d. 1957)
Augustus John, Welsh painter (d. 1961)
January 6 – Carl Sandburg, American poet and historian (d. 1967)
January 9 – John B. Watson, American psychologist (d. 1958)
January 11 – Theodoros Pangalos, Greek general, politician and President of Greece (d. 1952)
January 12 – Ferenc Molnár, Hungarian-born author (d. 1952)
January 16 – Harry Carey, American actor (d. 1947)
January 20 – Finlay Currie, Scottish actor (d. 1968)
January 22 – Constance Collier, English stage, screen actress (d. 1955)
January 23 – Rutland Boughton, English composer (d. 1960)
January 25 – Ernst Alexanderson, Swedish-born American television pioneer (d. 1975)
February 1 – Milan Hodža, Slovak politician, champion of regional integration in Europe (d. 1944)
February 2 – Alfréd Hajós, Hungarian swimmer, architect (d. 1955)
February 3 – Gordon Coates, 21st Prime Minister of New Zealand (d. 1943)
February 5 – André Citroën, French automobile manufacturer (d. 1935)
February 8 – Martin Buber, Austrian philosopher (d. 1965)
February 14 – Kōki Hirota, 21st Prime Minister of Japan (d. 1948)
February 16 – Big Jim Colosimo, Italian-born American gangster (d. 1920)
February 18 – Kate Gordon Moore, American psychologist (d. 1963)
February 21 – Mirra Alfassa, multi-origined spiritual leader and founder of Auroville, India (d. 1973)
February 26 – Emmy Destinn, Czech soprano (d. 1930)
February 28 – Pierre Fatou, French mathematician (d. 1929)
March 4
Egbert Van Alstyne, American songwriter, pianist (d. 1951)
Arishima Takeo, Japanese novelist, short-story writer and essayist (d. 1923)
March 5 – P. D. Ouspensky, Russian mathematician and philosopher (d. 1947)
March 7 – Boris Kustodiev, Soviet painter and designer (d. 1927)
March 16
Reza Shah Pahlavi, Shah of Iran (d. 1944)
Clemens August Graf von Galen, German Catholic cardinal (d. 1946)
March 20 – Heinrich XXIV, Prince Reuss of Greiz (d. 1927)
March 22 – Michel Théato, Luxembourg athlete (d. 1923)
March 26 – Henry Gullett, Australian politician (d. 1940)
March 31 – Jack Johnson, American boxer (d. 1946)


1878 (MDCCCLXXVIII) was a common year starting on Tuesday of the Gregorian calendar and a common year starting on Sunday of the Julian calendar, the 1878th year of the Common Era (CE) and Anno Domini (AD) designations, the 878th  year of the 2nd millennium, the 78th  year of the 19th century, and the  9th   year of the 1870s decade. As of the start of 1878, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.


The Congo Wars broke out in the late 1990s.
The First Congo War (October 1996 – May 1997) — resulted in the overthrow of dictator Mobutu Sese Seko, ending 32 years of his rule in Zaire, which was renamed the Democratic Republic of the Congo.
The Second Congo War (August 1998 – July 2003) — started in Central Africa and involved multiple nearby nations.
The Gulf War (August 1990 – February 1991) — Iraq was left in severe debt after the Iran–Iraq War in the 1980s. President Saddam Hussein accused Kuwait of flooding the market with oil and driving down prices. As a result, Iraqi forces invaded and conquered Kuwait. The UN (United Nations) immediately condemned the action, and a coalition force led by the United States was sent to the Persian Gulf. Aerial bombing of Iraq began in January 1991, and a month later, the UN forces drove the Iraqi army from Kuwait in four days.
The Chechen Wars were fought in the region of Chechnya.
The First Chechen War (1994–1996) — was a conflict fought between the Russian Federation and the Chechen Republic of Ichkeria. After the initial campaign of 1994–1995 culminated in the devastating Battle of Grozny, Russian federal forces attempted to seize control of the mountainous area of Chechnya. However, despite Russia's overwhelming manpower, weaponry, and air support, it was set back by Chechen guerrillas and raids on the flatlands. The resulting widespread demoralization of federal forces, and the almost universal opposition of the Russian public to the conflict, led Boris Yeltsin's government to declare a ceasefire in 1996 and sign a peace treaty a year later.
The Second Chechen War (1999 – 2009) — was started by the Russian Federation in response to the 1999 invasion of Dagestan and the Russian apartment bombings, which were blamed on the Chechens. Due to this military campaign, Russian forces largely recaptured the separatist region of Chechnya and the outcome of the First Chechen War — in which the region gained de facto independence as the Chechen Republic of Ichkeria — was essentially reversed.
The Eritrean–Ethiopian War (1998–2000) was started by the invasion of Eritrea into Ethiopia due to a claim over a town. The conflict resulted in tens of thousands of deaths in both sides and a peace agreement in December 2000.
The Kargil War (1999) — during May, Pakistan sent troops covertly to occupy strategic peaks in Kashmir. A month later, the Kargil War with India resulted in a political fiasco for Pakistani Prime Minister Nawaz Sharif, followed by a Pakistani military withdrawal to the Line of Control. The incident led to a military coup in October, in which Sharif was ousted by Army Chief Pervez Musharraf. This conflict remains the only war fought between two declared nuclear powers.
The Yugoslav Wars (1991–1995) — the breakup of Yugoslavia, beginning on 25 June 1991, after the republics of Croatia and Slovenia declared independence from Yugoslavia, was followed by the subsequent Yugoslav Wars. These wars became notorious for numerous war crimes and human rights violations such as ethnic cleansing and genocide, with the overwhelming majority of casualties being Muslim Bosniaks.
Ten-Day War (1991) — a brief military conflict between Slovenian TO (Slovenian Territorial Defence) and the Yugoslav People's Army (JNA) following Slovenia's declaration of independence.
Croatian War of Independence (1991–1995) — a war fought in modern-day Croatia between the Croatian government, having declared independence from the Socialist Federal Republic of Yugoslavia, and both the Yugoslav People's Army (JNA) and Serb forces, who established the self-proclaimed Republic of Serbian Krajina (RSK) within Croatia.
Bosnian War (1992–1995) — the war involved several ethnically defined factions within Bosnia and Herzegovina: Bosniaks, Serbs and Croats, as well as a smaller Bosniak faction led by Fikret Abdić. The Siege of Sarajevo (1992–1995) marked the most violent urban warfare in Europe since World War II at that time, as Serb forces bombarded and attacked Bosniak-controlled and populated areas of the city. War crimes occurred, including ethnic cleansing and destruction of civilian property.
The final fighting in the Croatian and Bosnian wars ended in 1995 with the success of Croatian military offensives against Serb forces and the mass exodus of Serbs from Croatia in 1995; Serb losses to Croat and Bosniak forces; and finally, the signing of the Dayton Agreement, which internally partitioned Bosnia and Herzegovina into a Republika Srpska and a Bosniak-Croat Federation.
Kosovo War (1998–1999) — a war between Albanian separatists and Yugoslav military and Serb paramilitary forces in Kosovo. The conflict began in 1996 and escalated in 1998, with increasing reports of atrocities.
In 1999, the North Atlantic Treaty Organization (NATO) led by the United States launched air attacks against Yugoslavia (then composed of only Serbia and Montenegro) to pressure the Yugoslav government to end its military operations against Albanian separatists in Kosovo. The intervention lacked UN approval yet was justified by NATO based on accusations of war crimes committed by Yugoslav military forces working alongside nationalist Serb paramilitary groups. Finally, after months of bombing, Yugoslavia accepted NATO's demands, and NATO forces (later UN peacekeeping forces) occupied Kosovo.
End of the South African Border War (1990) — this decade saw the end of a border war between Zambia, Angola, and Namibia that had been ongoing since 1966.


In 1990, the ending of the civil war and the return to political normalcy in Lebanon began. With the peace among all factions in Lebanon, the rebuilding of the country and its capital, Beirut, started.
1990 Nepalese revolution, a multiparty movement against the one-party Panchayat rule in Nepal. It led to the end of absolute monarchy in Nepal and the restoration of democracy.
Israeli Prime Minister Yitzhak Rabin and Palestinian Prime Minister Yasser Arafat agree to the Israeli–Palestinian peace process at the culmination of the Oslo Accords, negotiated by the United States President Bill Clinton on 13 September 1993.
By signing the Oslo accords, the Palestine Liberation Organization recognized Israel's right to exist. At the same time, Israel permitted the creation of an autonomous Palestinian National Authority consisting of the Gaza Strip and West Bank, which was implemented in 1994.
Israeli military forces withdrew from these Palestinian territories in compliance with the accord, which marked the end of the First Intifada (a period of violence between Palestinian Arab militants and Israeli armed forces from 1987 to 1993).
The Palestinian National Authority was created in 1994 following the Oslo Accords, giving Palestinian Arab people official autonomy over the Gaza Strip and West Bank, though not official independence from Israel.
On 4 November 1995, Israeli Prime Minister Yitzhak Rabin was assassinated by a right-wing extremist who opposed the signing of the Oslo Accords.
North Yemen and South Yemen merged to form Yemen in 1991.
Lee Kuan Yew relinquished prime-ministership of Singapore on 28 November 1990, a position he had held since 1959, to Goh Chok Tong. He remained in the cabinet as Senior Minister.
In July 1994, North Korean leader Kim Il-sung died, having ruled the country since its founding in 1948. His son Kim Jong-il, who succeeded him, took over a nation on the brink of complete economic collapse. Famine had caused a significant number of deaths in the late 1990s, and North Korea gained a reputation for being an important source of money laundering, counterfeiting, and weapons proliferation. The country's ability to produce and sell nuclear weapons became a concern in the international community.
In 1990, Aung San Suu Kyi's National League for Democracy in Burma won a majority of seats in the first free election conducted in 30 years. But the SPDC refused to relinquish power, beginning a peaceful struggle that started in the 1990s and continued for several decades by Aung San Suu Kyi and her supporters to demand the end of military rule.
In the Philippines, following the People Power Revolution of 1986, two Presidents were elected - first, Fidel V. Ramos in 1992, and second, Joseph Estrada in 1998.
Indonesian president Suharto resigned after ruling for 32 years (1966–1998), following the fall of Suharto and the reform era.
In India, the former prime minister Rajiv Gandhi was assassinated on 21 May 1991 by the Tamil Tigers, beginning a period of economic liberalization that Prime Minister led P. V. Narasimha Rao.
South Korea and Taiwan became developed countries. Following democratic reforms in 1988, neoliberal policies were led by President Kim Young-sam (South Korea) and President Lee Teng-hui (Taiwan), who led their countries during the 1997 Asian financial crisis.
Japan saw eight different prime ministers serve during the 1990s in what was at first called the "Lost Decade" but later became referred to as the Lost Decades. These included Morihiro Hosokawa, who won the 1993 Japanese general election and formed an opposition coalition until 1996.


The growth of speleothems (which requires rainwater) was detected in Hol-Zakh, Ashalim, Even-Sid, Ma'ale-ha-Meyshar, Ktora Cracks, Nagev Tzavoa Cave, and elsewhere, and has allowed tracking of prehistoric rainfall. The Red Sea coastal route was extremely arid before 140 and after 115 kya (thousands of years ago). Slightly wetter conditions appear at 90–87 kya, but it still was just one tenth the rainfall around 125 kya. In the southern Negev Desert speleothems did not grow between 185 and 140 kya (MIS 6), 110–90 (MIS 5.4–5.2), nor after 85 kya nor during most of the interglacial period (MIS 5.1), the glacial period and Holocene. This suggests that the southern Negev was arid-to-hyper-arid in these periods.
During the Last Glacial Maximum (LGM) the Sahara desert was more extensive than it is now with the extent of the tropical forests being greatly reduced, and the lower temperatures reduced the strength of the Hadley Cell. This is a climate cell which causes rising tropical air of the Inter-Tropical Convergence Zone (ITCZ) to bring rain to the tropics, while dry descending air, at about 20 degrees north, flows back to the equator and brings desert conditions to this region. It is associated with high rates of wind-blown mineral dust, and these dust levels are found as expected in marine cores from the north tropical Atlantic. But around 12,500 BCE the amount of dust in the cores in the Bølling/Allerød phase suddenly plummets and shows a period of much wetter conditions in the Sahara, indicating a Dansgaard-Oeschger (DO) event (a sudden warming followed by a slower cooling of the climate). The moister Saharan conditions had begun about 12,500 BCE, with the extension of the ITCZ northward in the northern hemisphere summer, bringing moist wet conditions and a savanna climate to the Sahara, which (apart from a short dry spell associated with the Younger Dryas) peaked during the Holocene thermal maximum climatic phase at 4000 BCE when mid-latitude temperatures seem to have been between 2 and 3 degrees warmer than in the recent past. Analysis of Nile River deposited sediments in the delta also shows this period had a higher proportion of sediments coming from the Blue Nile, suggesting higher rainfall also in the Ethiopian Highlands. This was caused principally by a stronger monsoonal circulation throughout the sub-tropical regions, affecting India, Arabia and the Sahara. Lake Victoria only recently became the source of the White Nile and dried out almost completely around 15 kya.
The sudden subsequent movement of the ITCZ southwards with a Heinrich event (a sudden cooling followed by a slower warming), linked to changes with the El Niño-Southern Oscillation cycle, led to a rapid drying out of the Saharan and Arabian regions, which quickly became desert. This is linked to a marked decline in the scale of the Nile floods between 2700 and 2100 BCE.


The sky is usually clear above the desert, and the sunshine duration is extremely high everywhere in the Sahara. Most of the desert has more than 3,600 hours of bright sunshine per year (over 82% of daylight hours), and a wide area in the eastern part has over 4,000 hours of bright sunshine per year (over 91% of daylight hours). The highest values are very close to the theoretical maximum value. A value of 4300 hours (98%) of the time would be recorded in Upper Egypt (Aswan, Luxor) and in the Nubian Desert (Wadi Halfa). The annual average direct solar irradiation is around 2,800 kWh/(m² year) in the Great Desert. The Sahara has a huge potential for solar energy production.
The high position of the Sun, the extremely low relative humidity, and the lack of vegetation and rainfall make the Great Desert the hottest large region in the world, and the hottest place on Earth during summer in some spots. The average high temperature exceeds 38 to 40 °C or 100.4 to 104.0 °F during the hottest month nearly everywhere in the desert except at very high altitudes. The world's highest officially recorded average daily high temperature was 47 °C or 116.6 °F in a remote desert town in the Algerian Desert called Bou Bernous, at an elevation of 378 metres (1,240 ft) above sea level, and only Death Valley, California rivals it. Other hot spots in Algeria such as Adrar, Timimoun, In Salah, Ouallene, Aoulef, Reggane with an elevation between 200 and 400 metres (660 and 1,310 ft) above sea level get slightly lower summer average highs, around 46 °C or 114.8 °F during the hottest months of the year. Salah, well known in Algeria for its extreme heat, has average high temperatures of 43.8 °C or 110.8 °F, 46.4 °C or 115.5 °F, 45.5 °C or 113.9 °F and 41.9 °C or 107.4 °F in June, July, August and September respectively. There are even hotter spots in the Sahara, but they are located in extremely remote areas, especially in the Azalai, lying in northern Mali. The major part of the desert experiences around three to five months when the average high strictly exceeds 40 °C or 104 °F; while in the southern central part of the desert, there are up to six or seven months when the average high temperature strictly exceeds 40 °C or 104 °F. Some examples of this are Bilma, Niger and Faya-Largeau, Chad. The annual average daily temperature exceeds 20 °C or 68 °F everywhere and can approach 30 °C or 86 °F in the hottest regions year-round. However, most of the desert has a value in excess of 25 °C or 77 °F.
Sand and ground temperatures are even more extreme. During daytime, the sand temperature is extremely high: it can easily reach 80 °C or 176 °F or more. A sand temperature of 83.5 °C (182.3 °F) has been recorded in Port Sudan. Ground temperatures of 72 °C or 161.6 °F have been recorded in the Adrar of Mauritania and a value of 75 °C (167 °F) has been measured in Borkou, northern Chad.
Due to lack of cloud cover and very low humidity, the desert usually has high diurnal temperature variations between days and nights. However, it is a myth that the nights are especially cold after extremely hot days in the Sahara. On average, nighttime temperatures tend to be 13–20 °C (23–36 °F) cooler than in the daytime. The smallest variations are found along the coastal regions due to high humidity and are often even lower than a 10 °C or 18 °F difference, while the largest variations are found in inland desert areas where the humidity is the lowest, mainly in the southern Sahara. Still, it is true that winter nights can be cold, as it can drop to the freezing point and even below, especially in high-elevation areas. The frequency of subfreezing winter nights in the Sahara is strongly influenced by the North Atlantic Oscillation (NAO), with warmer winter temperatures during negative NAO events and cooler winters with more frosts when the NAO is positive. This is because the weaker clockwise flow around the eastern side of the subtropical anticyclone during negative NAO winters, although too dry to produce more than negligible precipitation, does reduce the flow of dry, cold air from higher latitudes of Eurasia into the Sahara significantly.


The Sahara is the world's largest hot desert. It is located in the horse latitudes under the subtropical ridge, a significant belt of semi-permanent subtropical warm-core high pressure where the air from the upper troposphere usually descends, warming and drying the lower troposphere and preventing cloud formation.
The permanent absence of clouds allows unhindered light and thermal radiation. The stability of the atmosphere above the desert prevents any convective overturning, thus making rainfall virtually non-existent. As a consequence, the weather tends to be sunny, dry and stable with a minimal chance of rainfall. Subsiding, diverging, dry air masses associated with subtropical high-pressure systems are extremely unfavorable for the development of convectional showers. The subtropical ridge is the predominant factor that explains the hot desert climate (Köppen climate classification BWh) of this vast region. The descending airflow is the strongest and the most effective over the eastern part of the Great Desert, in the Libyan Desert: this is the sunniest, driest and the most nearly "rainless" place on the planet, rivaling the Atacama Desert, lying in Chile and Peru.
The rainfall inhibition and the dissipation of cloud cover are most accentuated over the eastern section of the Sahara rather than the western. The prevailing air mass lying above the Sahara is the continental tropical (cT) air mass, which is hot and dry. Hot, dry air masses primarily form over the North-African desert from the heating of the vast continental land area, and it affects the whole desert during most of the year. Because of this extreme heating process, a thermal low is usually noticed near the surface, and is the strongest and the most developed during the summertime. The Sahara High represents the eastern continental extension of the Azores High, centered over the North Atlantic Ocean. The subsidence of the Sahara High nearly reaches the ground during the coolest part of the year, while it is confined to the upper troposphere during the hottest periods.
The effects of local surface low pressure are extremely limited because upper-level subsidence still continues to block any form of air ascent. Also, to be protected against rain-bearing weather systems by the atmospheric circulation itself, the desert is made even drier by its geographical configuration and location. Indeed, the extreme aridity of the Sahara is not only explained by the subtropical high pressure: the Atlas Mountains of Algeria, Morocco and Tunisia also help to enhance the aridity of the northern part of the desert. These major mountain ranges act as a barrier, causing a strong rain shadow effect on the leeward side by dropping much of the humidity brought by atmospheric disturbances along the polar front which affects the surrounding Mediterranean climates.
The primary source of rain in the Sahara is the Intertropical Convergence Zone, a continuous belt of low-pressure systems near the equator which bring the brief, short and irregular rainy season to the Sahel and southern Sahara. Rainfall in this giant desert has to overcome the physical and atmospheric barriers that normally prevent the production of precipitation. The harsh climate of the Sahara is characterized by: extremely low, unreliable, highly erratic rainfall; extremely high sunshine duration values; high temperatures year-round; negligible rates of relative humidity; a significant diurnal temperature variation; and extremely high levels of potential evaporation which are the highest recorded worldwide.


The Sahara covers large parts of Algeria, Chad, Egypt, Libya, Mali, Mauritania, Morocco, Niger, Western Sahara, Sudan and Tunisia. It covers 9 million square kilometres (3,500,000 sq mi), amounting to 31% of Africa. If all areas with a mean annual precipitation of less than 250 mm were included, the Sahara would be 11 million square kilometres (4,200,000 sq mi). It is one of three distinct physiographic provinces of the African massive physiographic division. Sahara is so large and bright that, in theory, it could be detected from other stars as a surface feature of Earth, with near-current technology.
The Sahara is mainly rocky hamada (stone plateaus); ergs (sand seas – large areas covered with sand dunes) form only a minor part, but many of the sand dunes are over 180 metres (590 ft) high. Wind or rare rainfall shape the desert features: sand dunes, dune fields, sand seas, stone plateaus, gravel plains (reg), dry valleys (wadi), dry lakes (oued), and salt flats (shatt or chott). Unusual landforms include the Richat Structure in Mauritania.
Several deeply dissected mountains, many volcanic, rise from the desert, including the Aïr Mountains, Ahaggar Mountains, Saharan Atlas, Tibesti Mountains, Adrar des Iforas, and the Red Sea Hills. The highest peak in the Sahara is Emi Koussi, a shield volcano in the Tibesti range of northern Chad.
The central Sahara is hyperarid, with sparse vegetation. The northern and southern reaches of the desert, along with the highlands, have areas of sparse grassland and desert shrub, with trees and taller shrubs in wadis, where moisture collects. In the central, hyperarid region, there are many subdivisions of the great desert: Tanezrouft, the Ténéré, the Libyan Desert, the Eastern Desert, the Nubian Desert and others. These extremely arid areas often receive no rain for years.
To the north, the Sahara skirts the Mediterranean Sea in Egypt and portions of Libya, but in Cyrenaica and the Maghreb, the Sahara borders the Mediterranean forest, woodland, and scrub eco-regions of northern Africa, all of which have a Mediterranean climate characterized by hot summers and cool and rainy winters. According to the botanical criteria of Frank White and geographer Robert Capot-Rey, the northern limit of the Sahara corresponds to the northern limit of date palm cultivation and the southern limit of the range of esparto, a grass typical of the Mediterranean climate portion of the Maghreb and Iberia. The northern limit also corresponds to the 100 mm (3.9 in) isohyet of annual precipitation.
To the south, the Sahara is bounded by the Sahel, a belt of dry tropical savanna with a summer rainy season that extends across Africa from east to west. The southern limit of the Sahara is indicated botanically by the southern limit of Cornulaca monacantha (a drought-tolerant member of the Chenopodiaceae), or northern limit of Cenchrus biflorus, a grass typical of the Sahel. According to climatic criteria, the southern limit of the Sahara corresponds to the 150 mm (5.9 in) isohyet of annual precipitation (this is a long-term average, since precipitation varies annually).
Important cities located in the Sahara include Nouakchott, the capital of Mauritania; Tamanrasset, Ouargla, Béchar, Hassi Messaoud, Ghardaïa, and El Oued in Algeria; Timbuktu in Mali; Agadez in Niger; Ghat in Libya; and Faya-Largeau in Chad.


April 15
Drillers near Bartlesville, Oklahoma strike oil for the first time, in the designated "Indian Territory", on land leased from the Osage Indians. The gusher, at the Nellie Johnstone Number One well, leads to rapid population growth.
Yamaichi Securities founded in Japan; it will cease trading a hundred years later.
April 19 – The first Boston Marathon is held in the United States, with fifteen men competing, and won by John McDermott.
April 23 – Representatives of the Chickasaw Nation, Choctaw Nation and U.S. Dawes Commission sign the Atoka Agreement, which becomes an important precursor for creating the State of Oklahoma.
April 27–6 May – Greco-Turkish War of 1897: Battle of Velestino.
Prime Minister Lester B. Pearson is born.
April 30 –  J. J. Thomson of the Cavendish Laboratory announces his discovery of the electron as a subatomic particle, over 1,800 times smaller than a proton (in the atomic nucleus), at a lecture at the Royal Institution in London.
May 6 – John Jacob Abel announces the successful isolation of epinephrine (adrenaline), in a paper read before the Association of American Physicians.
May 10 – 19 zinc miners die of carbon monoxide poisoning at Snaefell Mine on the Isle of Man.
May 11 – A patent is awarded for the invention of the first automotive muffler, with the granting by the U.S. Patent Office of application number 582,485 to Milton Reeves and his brother Marshall T. Reeves, of the Reeves Pulley Company of Columbus, Indiana.
May 14
The Stars and Stripes Forever, an American patriotic march by John Philip Sousa, is performed for the first time.
(or May 15) – The Scientific-Humanitarian Committee (Wissenschaftlich-humanitäres Komitee, WhK) is founded in Berlin as an LGBT campaigning organization, the first such in history.
May 19 – Oscar Wilde is released from prison in England, and goes into exile on the continent.
May 22 – The Blackwall Tunnel, at this time the longest underwater road tunnel in the world, is opened for traffic beneath the River Thames in the East End of London by the Prince of Wales.
May 26 – Irish-born theatrical manager Bram Stoker's contemporary Gothic horror novel Dracula is first published (in London); it will influence the direction of vampire literature for the following century.
June 12 – 1897 Assam earthquake: An earthquake of magnitude of 8.0 rocks Assam, India, killing over 1,500 people.
June 18 – Kyoto University is officially established in Japan.
June 22 – The Diamond Jubilee of Queen Victoria is celebrated in the United Kingdom. No other British monarch will celebrate such a jubilee until Elizabeth II in 2012.


1897 (MDCCCXCVII) was a common year starting on Friday of the Gregorian calendar and a common year starting on Wednesday of the Julian calendar, the 1897th year of the Common Era (CE) and Anno Domini (AD) designations, the 897th  year of the 2nd millennium, the 97th  year of the 19th century, and the  8th   year of the 1890s decade. As of the start of 1897, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.


Although the morphology of beeflies varies in detail, adults of most bee flies are characterized by some morphological details that make recognition easy. The dimensions of the body vary, depending on the species, from 1.0 mm to 2.5 cm. The form is often compact and the integument is usually covered with dense and abundant hair. The coloration is usually inconspicuous and colours such as brown, blackish- grey, and light colors like white or yellow predominate. Many species are mimics of Hymenoptera Apoidea. In other species patches of flattened hairs occur that can act as silvery, gilded or coppertone reflecting mirrors; these perhaps serve as visual signals in conspecific mate/rival recognition, or perhaps imitate reflecting surface particles on bare soils with high content of materials like quartz, mica or pyrite.
The head is round, with a convex face, often holoptic in males. The antennae are of the type aristate composed of three to six segments, with the third segment larger than the others; the stylus is absent (antenna of three segments) or is composed of one to three flagellomeres (antenna of four to six segments). The mouthparts are modified for sucking and adapted for feeding on flowers. The length varies considerably: for example, the Anthracinae have short mouthparts, with the labium terminating in a large fleshy labellum, in Bombyliinae; in Phthiriinae, the tube is considerably longer, and in Bombyliinae more than four times the length of the head.
The legs are long and thin and the front legs are sometimes smaller and more slender than the middle and rear legs. Typically, they are provided with bristles at the apex of the tibiae, without empodia and, sometimes, also without pulvilli. The wings are transparent, often hyaline or evenly colored or with bands. The alula are well developed and in the rest position the wings are kept open and horizontal in a V shape revealing the sides of the abdomen.
The abdomen is generally short and wide, subglobose-shaped, cylindrical, or conical, composed of six to eight apparent urites. The remaining urites are part of the structure of the external genitalia. The abdomen of the females often ends with spinous processes, used in ovideposition. In Anthracinae and  Bombyliinae, a diverticulum is present in the eighth urite, in which the eggs are mixed with sand before being deposited.
The wing venation, although variable within the family, has some common characteristics that can be summarized basically in the particular morphology of the branches of the radial sector and the reduction of the forking of the media. The costa is spread over the entire margin and the subcosta is long, often ending on the distal half of the costal margin. The radius is almost always divided into four branches, with fusion of the branches R 2 and R 3, and is characterized by the sinuosity of the end portions of the branches of the radial sector. The venation presents a marked simplification compared to other Asiloidea and, in general, to other lower Brachycera. M 1 is always present and converges on the margin or, sometimes, of R 5. M 2 is present and reaches the margin, or is absent. M 3 is always absent and merged with M 4. The discal cell is usually present. The branch M 3 +4 is separated from the discal cell at the distal posterior vertex, so the mid-cubital connects directly to the posterior margin of the discal cell. The cubital and anal veins are complete and end separately on the margin or converge joining for a short distance Consequently, the cell cup may be open or closed.
Hoverflies of the family Syrphidae often mimic Hymenoptera as well, and some syrphid species are hard to tell apart from Bombyliidae at first glance, especially for bee fly species that lack a long proboscis or long, thin legs. Such bombyliids can still be distinguished in the field by anatomical features such as:
- They usually have an evenly curved or sloping face (hoverflies often have prominent bulges of the facial cuticle and/or beak- to knob-like facial projections).
- The wings lack a "false rear edge" and often have large dark areas with sharp boundaries, or complex patterns of spots (hoverfly wings are often clear or have smooth gradients of tinting, and their veins merge posteriorly into a "false edge" rather than reaching the wing's true rear edge).
- The abdomen and thorax hardly ever have large glossy areas formed by exposed cuticle (hoverflies often have glossy cuticular body surfaces).