Events By Place Byzantine Empire Summer - Maurice agrees to Khosrau's entreaties, and agrees to restart the war with Persia. Europe Owain mab Urien becomes king of Rheged (approximate date). Asia January 6 — Hormizd IV deposed as Persian king. February 15 — Khosrau II is crowned as king of Persia. February 20 — Bahram Chobin and Khosrau confront each other near Ctesiphon. February 28 — Bahram attacks Khosrau at night; Khosrau flees for Circesium the next day… (More on 590)