Events By Place Europe Vortigern forms an alliance with Hengest and Horsa, by tradition chieftains of the Jutes, who led the Anglo-Saxon invasion of Britain (traditional date). By Topic Religion August 3 — The Second Council of Ephesus opens, chaired by Dioscorus, Patriarch of Alexandria. Flavian, Patriarch of Constantinople, and Domnus II, Patriarch of Antioch, are deposed on August 8. October - A Roman synod repudiates all the decisions of the Second Council of Ephesus. Anatolius… (More on 449)