King Arthur Badon, where he is said to have single-handedly killed 960 men. Recent studies, however, question the reliability of the "Historia Brittonum". The other text that seems to support the case for Arthur's historical existence is the 10th-century "Annales Cambriae", which also link Arthur with the Battle of Badon. The "Annales" date this battle to 516–518, and also mention the Battle of Camlann, in which Arthur and Medraut (Mordred) were both killed, dated to 537–539. These details have often been used to bolster confidence in the "Historia"<nowiki>'</nowiki>s account and to confirm that Arthur really did fight at Badon. Problems have been
Historicity of King Arthur date ascribed to the "Historia Brittonum" which is usually attributed to Nennius, a Welsh ecclesiastic. "Historia Brittonum" lists 12 battles fought by Arthur and gives him the title of "dux bellorum" (war commander or leader), saying that Arthur fought "alongside the kings of the Britons", rather than that Arthur was himself a king. The list is inserted between the death of Hengist and the reign of Ida of Bernicia. Other accounts associating Arthur with the Battle of Badon can be shown to be derived directly or indirectly from the "Historia Brittonum". The earliest version of the "Annales Cambriae" was composed