The Anglo Saxons were a group of Germanic tribes who invaded Britain in the 5th and 6th centuries AD. There are several reasons why they chose to invade Britain. One reason was the collapse of the Roman Empire, which had previously controlled Britain. With the Romans gone, there was no central authority to maintain order and protect the island from invaders. This made Britain an attractive target for the Anglo Saxons.

Another reason for the invasion was the desire for land and resources. The Anglo Saxons were a farming people, and they needed fertile land to grow crops and raise livestock. Britain had plenty of land, and the Anglo Saxons saw an opportunity to establish their own settlements and build their own communities.

The evidence that has led us to these conclusions comes from a variety of sources. One of the most important sources is the Anglo Saxon Chronicle, a collection of historical records written by the Anglo Saxons themselves. The Chronicle tells us about the battles and conquests of the Anglo Saxons, and gives us a sense of their motivations and goals.

Archaeological evidence also supports the idea that the Anglo Saxons were looking for land and resources. Excavations of Anglo Saxon settlements have revealed evidence of farming, including ploughs, animal bones, and grain storage pits. These settlements were often located near rivers or other sources of water, which would have been important for agriculture.

Overall, the Anglo Saxons invaded Britain because they saw an opportunity to establish their own communities and gain access to land and resources. They chose to settle in areas that were fertile and had access to water, and they built their own farms and villages. The evidence from historical records and archaeology helps us to understand the motivations and actions of the Anglo Saxons during this period of British history.