The Lazic War, also known as the Colchidian War or in Georgian historiography as the Great War of Egrisi (Georgian: ეგრისის დიდი ომი, Egrisis Didi Omi), was fought between the East Roman (Byzantine) Empire and the Sasanian Empire for control of the ancient Georgian region of Lazica. The Lazic War lasted for twenty years, from 541 to 562, with varying success and ended in a victory for the Persians, who obtained an annual tribute in exchange for ending the war. The Lazic War is narrated in detail in the works of Procopius of Caesarea and Agathias.