Byzantine Empire June 18 – Emperor Leo III ("the Isaurian") dies of dropsy at Constantinople, after a 24-year reign that has saved the Byzantine Empire and delivered Eastern Europe from the threat of an Arab conquest. He is succeeded by his son Constantine V. Artabasdos, Byzantine general (strategos) of the Armeniac theme, defeats Constantine V and advances on Constantinople, where he is crowned emperor. He secures the support of the themes of Thrace and Opsikion, and abandons Leo's religious policy of iconoclasm. Constantine seeks the support of the Anatolic theme.
Byzantine Empire June 18 – Emperor Leo III ("the Isaurian") dies of dropsy at Constantinople, after a 24-year reign that has saved the Byzantine Empire and delivered Eastern Europe from the threat of an Arab conquest. He is succeeded by his son Constantine V. Artabasdos, Byzantine general (strategos) of the Armeniac theme, defeats Constantine V and advances on Constantinople, where he is crowned emperor. He secures the support of the themes of Thrace and Opsikion, and abandons Leo's religious policy of iconoclasm. Constantine seeks the support of the Anatolic theme.