827. Egbert, King of Wessex, acquires the supremacy over the other Anglo-Saxon kingdoms.
832. The first Danish squadron attacks part of the English coast. The Danes, or Northmen, had begun their ravages in France a few years earlier. For two centuries Scandinavia sends out fleet after fleet of sea-rovers, who desolate all the western kingdoms of Europe, and in many cases effect permanent conquests.
871—900. Reign of Alfred in England. After a long and varied struggle he rescues England from the Danish invaders.
911. The French king cedes Neustria to Hrolf the Northman. Hrolf (or Duke Rollo, as he thenceforth was termed) and his army of Scandinavian warriors become the ruling class of the population of the province, which is called after them Normandy.
1016. Four knights from Normandy, who had been on a pilgrimage to the Holy Land, while returning through Italy head the people of Salerno in repelling an attack of a band of Saracen corsairs. In the next year many adventurers from Normandy settle in Italy, where they conquer Apulia (1040), and afterwards (1060) Sicily.
1017. Canute, king of Denmark, becomes king of England. On the death of the last of his sons,