The Anglo-Saxons migrated to the British Isles in the middle of the first millennium A.D. They ruled England until the Norman Conquest in 1066.
Anglo-Saxons were the ethnic group the resulted over the centuries from the melding of the various Germanic tribes who invaded Roman Britannia around the 5th century, including the Angles, Jutes, and Saxons.
By the time of the Norman invasion in 1066 the Anglo-Saxons had become the indigenous population of England.
Anglo-Saxon is a term used by english historians to designate the german tribes who invaded and settled the south and east/southeast of Britain beginning in the early 5th century AD