Janet and Colin Bord (in 'Prehistoric Britain from the air') add that after his death, King Arthur lived on – lives on? – at Badbury Rings in the form of a Raven.*
According to an 'ancient chronicler' mentioned in the superbly illustrated 'Readers Digest Folklore Myths and Legends of Britain':
"Arthur carried the cross of Our Lord Jesus Christ for three days and nights on his shoulders, and the Britons were victorious." (I assume that's a metaphorical cross or it would have got in the way of the fighting). The Battle was said to have given Britain 21 years of peace – until Arthur had to take up arms against his treacherous nephew Mordred.
*According to Westwood and Simpson ('Lore of the Land, 2005) this idea came from A H Allcroft, who in 1908 linked a passage in Don Quixote about Arthur and ravens to this particular site. They also mention the folklore current in the 1960s – that at midnight you might see King Arthur trotting around the hill with his knights.