<human>:  Why did the Anglo Saxons have to fight so much?
<bot>: The Anglo Saxons had to fight because they were constantly being invaded by the Vikings. The Anglo Saxons were a Germanic tribe that settled in England, and they were constantly fighting the Vikings. The Vikings were a group of people that lived in Scandinavia and invaded the British Isles. The Vikings were a threat to the Anglo Saxons because they could attack them and steal their land.