Historicity of King Arthur in the mid-10th century and gives the date of Badon as 516, and it lists Arthur's death as occurring in 537 at the Battle of Camlann. The annals survive in a version dating from the 10th century, and all other sources that name Arthur were written at least 400 years after the events which they describe. Arthur was first styled as a king of the Britons in Geoffrey of Monmouth's chronicle "Historia Regum Britanniae" (c. 1136). Geoffrey also makes Ambrosius Aurelianus (whom he calls Aurelius Ambrosius) a king of Britain and an older brother of Uther Pendragon, father of Arthur,
Historicity of King Arthur served in Britain in the late 2nd century or early 3rd century, was a prototype of Arthur. Artorius is known from two inscriptions that give details about his service. After a long career as a centurion in the Roman army, he was promoted to prefect of Legio VI Victrix, a legion headquartered in Eboracum (present-day York, England). He later commanded two British legions on an expedition against either the Armoricans (in present-day Brittany) or the Armenians. He subsequently became civilian governor of Liburnia in modern Croatia, where he died. Kemp Malone first made the connection between Artorius and King Arthur