De Excidio et Conquestu Britanniae
…Battle of Mons Badonicus. It is a matter of dispute whether Gildas named the "proud tyrant" (superbus tyrannus) who invited the Saxons to Britain as Vortigern, as not all manuscripts contain the name. Theodor Mommsen believed that Gildas did not use the name Vortigern, and that in those manuscripts where it…