The Germanic Conquest
About the year 449 an event occurred that profoundly affected the course of history. In that year, as traditionally stated, began the invasion of Britain by certain Germanic tribes, the founders of the English nation. For more than a hundred years bands of conquerors and settlers migrated from their continental homes in the region of Denmark and the Low Countries and established themselves in the south and east of the island, gradually extending the area they occupied until it included all but the highlands in the west and north. The events of these years are wrapped in much obscurity. Although we can form a general idea of their course, we are still in doubt about some of the tribes that took part in the movement, their exact location on the continent, and the dates of their respective migrations.
The traditional account of the Germanic invasions goes back to Bede and the Anglo-Saxon Chronicle. Bede in his Ecdesiastical History of the English People, completed in 731, tells us that the Germanic tribes that conquered England were the Jutes, Saxons, and Angles. From what he says and from other indications, it seems possible that the Jutes and the Angles had their home in the Danish peninsula, the Jutes in the northern half (hence the name Jutland)