The battle is thought to be a historical occurrence and many annals describe some part of it. In the Historia Brittonum, the following passage is found;
- "The twelfth battle was on Mount Badon in which there fell in one day 960 men from one charge by Arthur; and no one struck them down except Arthur himself"
Among the accounts that mention the battle are Gildas' De Excidio Britanniae, the Ecclesiastical History of the English People, by Bede and Geoffrey of Monmouth's History of the Kings of Britain. The accuracy of the latter is severely doubted as it places importance on the alleged descent of the pre-Roman British chiefs from Aeneas of Troy.