The Anglo-Saxon tribes began their invasion of Britain, as Roman legions departed for Rome. According to the Anglo-Saxon Chronicles, they set foot on British soil in 449.
Saxon mercenaries led by Hengest and Horsa, sons of Whitgils landed in Kent at the invitation of the Celtic King; Vortigern. He who was fighting a losing battle against the Picts of Scotland, called upon mercenaries for assistance. They fought well, and victory was theirs against the Picts.
With victory theirs, the Saxon mercenaries sacked their employer Vortigern, and began taking land from the celts in south-eastern areas. Hengest went forth and established himself in Kent.
These Saxon tribes originated from across European states: Saxons from Germany, Angles from Schleswig-Holstein, Jutes and Frisians from Jutland, Denmark. According to the Beowulf poem, the Jutes could have been the Geats of Sweden.
The British found a strong leader, as the legendary King Arthur stepped forward, in their time of struggle against these Saxons. King Arthur commanded a well armed cavalry unit, and went on to achieve victory at Mount Badon.
With the death of Arthur, Celtic resistance against these Saxon invaders soon collapsed.
Some Celts were assimulated into Anglo-Saxon society, whilst others were driven to the outer fringes of Britain, Wales, Cumbria and the Cornish peninsula.
Wales, derives its name from the Anglo-Saxons word Wealas, which means foreigner.
Cornwall, derives its name from the words, Kernow and Waelas.
Cumbria derives its name fron the Celtic word, Cymru which means comrades.
Whilst conquered territory became known as Angleland.