In the early 5th century, the Romans left Britain. The Anglo-Saxons were Germanic tribes who invaded Britain during the 5th century. They were descendants of three main tribes: the Angles, Saxons, and the Jutes. The Anglo-Saxons remained a dominant ruling force and ruled England from AD 924 until the defeat of their last king Harold II at the Battle of Hastings in 1066. William of Normandy (the Conqueror) invaded England.