The Vikings first invaded Britain in AD 793 and last invaded in 1066 when William the Conqueror became King of England after the Battle of Hastings.
The first place the Vikings raided in Britain was the monastery at Lindisfarne,
a small holy island located off the northeast coast of England. Some of the monks were drowned in the sea, others killed or taken away as slaves along with many treasures of the church.
The raid on Lindisfarne marks the start of the Viking migration from Scandinavia in 793.
In the years that followed, villages near the sea, monasteries and even cities found themselves besieged by these sea-based foreign intruders. Soon no region of the British Isles (Britain and nearby islands) was safe from the Vikings. They attacked villages and towns in Wales, Scotland, Ireland, the Isle of Man and England.
By 866 the Vikings had arrived in York. They made York (or Jorvik as they called it) the second biggest city in the country after London.
No matter how many times the Vikings were beaten, they always came back, and in the end all their efforts paid off. It was the Vikings (Norsemen) of Normandy who finally conquered England in 1066 and changed British history for ever.