Leo V the Armenian (Greek: Λέων ὁ ἐξ Ἀρμενίας, Leōn ho ex Armenias; 775 – 24 December 820) was Emperor of the Byzantine Empire from 813 to 820. A senior general, he forced his predecessor, Michael I Rangabe, to abdicate and assumed the throne. He ended the decade-long war with the Bulgars, and initiated the second period of Byzantine Iconoclasm.