577

Year 577 (DLXXVII) was a common year starting on Friday (link will display the full calendar) of the Julian calendar. The denomination 577 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
Events
By place
Byzantine Empire

Byzantine–Sassanid War: A Byzantine expeditionary force under command of Justinian (magister militum) invade Caucasian Albania, launching raids across the Caspian Sea against the Persians.
Summer – Tiberius, Byzantine co-ruler (Caesar), establishes a naval base at Derbent on the Caspian Sea to construct a Byzantine fleet (approximate date).
Winter – Maurice is appointed commander-in-chief of the Byzantine army in the East. He succeeds Justinian, despite complete lack of military experience.

Europe

Battle of Deorham: The Anglo-Saxons under Ceawlin of Wessex
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