June 26--United Nations Charter signed in San Francisco by representatives of 50 nations.
Oct. 24--United Nations is created as charter comes into effect when all permanent Security Council members and majority of original signatories approve it.
Jan. 10--First General Assembly, with 51 states represented, opens in Central Hall, Westminster, London.
Feb. 1--Trygve Lie, a Norwegian, appointed first secretary-general.
Feb. 14--The UN votes to locate its headquarters in the United States. First headquarters in U.S. are at Hunter College in the Bronx, New York City.
Dec. 11--Assembly meets in Sperry Gyroscope plant at Lake Success, Long Island, New York. Lake Success is site of UN headquarters until 1951-1952.
Nov. 29--General Assembly adopts plan to end British mandate in Palestine, and partition it into an Arab and Jewish state with Jerusalem under UN administration.
Dec. 10--General Assembly adopts Universal Declaration on Human Rights.
Jan. 1--India and Pakistan accept UN-sponsored cease-fire in their 14-month undeclared war over Kashmir.
Jan. 7--Dr. Ralph Bunche, undersecretary-general, secures cease-fire between new State of Israel and Arabs.
Dec. 3--General Assembly establishes Office of High Commissioner for Refugees. Dec. 27--Indonesia wins independence from Netherlands as a result of UN efforts.
Jan. 10--Soviet Union boycotts Security Council, after council fails to act on its proposal to oust representative of Nationalist China.
June 27--When North Korea invades South Korea, Security Council--acting in absence of the Soviets--votes military sanctions and calls on members to help repel invasion. In July, it establishes unified force under United States command.
Dec. 10--Ralph Bunche receives the Nobel Peace Prize.
The Secretariat building is completed in Manhattan, New York City.
The General Assembly and Conference buildings are completed.
Jan. 5--Overriding South African objections, General Assembly takes up question of apartheid.
April 7--Dag Hammarskjold, Swedish diplomat and economist, elected secretary- general after Trygve Lie`s resignation.
July 27--UN and North Korea sign truce agreement.
Dec.--Office of UN High Commissioner for Refugees receives Nobel Peace Prize. 1955
Dec. 14--After years of stalemate in the Security Council over membership applications of several countries, a compromise results in admission of 16 countries.
Nov. 3--Prime Minister Imre Nagy of Hungary appeals to Security Council to counter Soviet invasion. A day later, assembly approves resolution, 50 to 8, but it remains unenforced.
Nov. 6--First Emergency Special Session of General Assembly meets over Suez Canal crisis (Israel, Britain and France invade Egypt after terrorist raids from Egypt into Israel); establishes first independent peacekeeping force, UN Emergency Force.
April 27--UN supervises elections in French Togoland, which lead to its independence as Togo.
Sixteen newly independent African countries join UN; General Assembly adopts Declaration on the Granting of Independence to Colonial Countries and Peoples. July 15--UN peacekeeping force dispatched to Congo to keep order in face of secessionist movement in Katanga Province.
Sept. 23--In General Assembly, Nikita Khrushchev, the Soviet leader, accuses Secretary-General Dag Hammarskjold of abusing his position and demands his resignation, proposing three-man (troika) directorate as substitute.
Sept. 18--Secretary-General Hammarskjold dies in an air crash while on mission to Congo. He is posthumously awarded Nobel Peace Prize.
Oct. 25--Adlai Stevenson, U.S. delegate, brings evidence to Security Council that Soviet missile bases are in Cuba. Secretary-General U Thant of Burma tries to negotiate solution.
World Food Program, established by UN Food and Agriculture Organization to provide aid to nations, begins operation.
May 1--UN transfers administration of West New Guinea (West Irian), a former Dutch colony, to Indonesia.
Aug. 7--Security Council votes voluntary arms embargo against South Africa.
March 4--Security Council approves dispatch of peacekeeping force to Cyprus to prevent war between Greek and Turkish Cypriot forces.
Dec.--UNICEF receives the Nobel Peace Prize.
Oct. 27--General Assembly strips South Africa of its mandate to govern South- West Africa (Namibia) but is unable to establish provisional UN authority.
Dec. 16--Security Council imposes mandatory sanctions against Rhodesia (now Zimbabwe).
June 18--The Security Council arranges a cease-fire to end the Six-Day Arab-Israeli War.
Nov. 23--After the Six-Day War, Security Council adopts Resolution 242 calling for withdrawal of Israeli forces from occupied territories.
June 12--Assembly approves Treaty on Nonproliferation of Nuclear Weapons and urges ratification.
March 13--Convention on Elimination of All Forms of Racial Discrimination comes into force.