The Anglo-Saxon period in Britain lasted from 449 to 1066 AD. This was a time of invasion and settlement, as Germanic tribes from mainland Europe, including the Angles, Saxons and Jutes, migrated to Britain and established kingdoms after the withdrawal of the Roman legions in the early 5th century. The Anglo-Saxons introduced their language and culture, and Britain was gradually converted to Christianity over the course of the period. Various outside threats challenged Anglo-Saxon rule at different points, including the Vikings from the late 8th century and the Norman conquest of 1066, which marked the end of the Anglo-Saxon era.