The second set of 12 lectures deals with the course and impact of the Viking raids between the late 8th through the early 11th centuries. Danish and Norwegian raiders profoundly altered the political balance of Western Europe. Danes conquered and settled eastern and northern England, a region known as the Danelaw. They compelled King Alfred the Great of Wessex (r. 870–899) and his successors to forge an effective monarchy. In France, Vikings under Rollo embraced Christianity and settled the fief of Normandy in 911, thereby founding one of the most formidable feudal states of Europe. Norwegian Vikings settled in the main towns of Ireland and braved the North Atlantic, settling the Faeroes, Iceland, and Greenland, as well as an ephemeral colony at L’Anse aux Meadows, Newfoundland. In Eastern Europe, Swedes developed a major trade route from the Baltic to the Caspian, laying the foundations for the Russian principalities.
The last 12 lectures explain the passing of the Viking Age. Over two centuries of overseas raids, trade, and settlement altered Scandinavian civilization. Scandinavians accepted Christianity and gained the high culture of Latin Christendom. Christian Danish and Norwegian kings in the 10th century first harnessed the Viking spirit to establish monarchies. Cnut the Great (r. 1014–1035), king of Denmark, England, and Norway, briefly turned the North Sea into a Scandinavian lake. His institutions and example inspired the formation of Christian kingdoms in Scandinavia and turned Vikings into Crusaders. Yet perhaps the most enduring of achievements of the Viking Age were the sagas and verse of Iceland that immortalized pagan heroes and Christian kings, Norse gods and indomitable settlers of the remote island.