The Angles, Saxons, and Jutes are known as the Anglo-Saxons. The Angles and the Saxon tribes were the largest of the three attacking tribes and so we often know them as Anglo-Saxons. They shared the same language but were each ruled by different strong warriors.
The first Anglo-Saxons raided the shores of south and east England in the fourth century AD, but they were beaten back by the Romans. At the beginning of the fifth century, the Romans left Britain. They had not trained the British to defend themselves and so the next time the Saxons tried to invade Britain they succeeded.
Historians are not sure why the Anglo-Saxons came to Britain. Some sources say that the Saxon warriors were invited to come, to the area now known as England, to help keep out invaders from Scotland and Ireland.Another reason for coming may have been because their land often flooded and it was difficult to grow crops, so they were looking for new places to settle down and farm.