Byzantine civil war of 1352–57 Part of the Byzantine civil wars, the Byzantine–Serbian wars and the Byzantine–Turkish wars Date 1352–1357 Location Thrace and Constantinople Result John V Palaiologos becomes sole ruler, deposes the Kantakouzenoi Belligerents John V Palaiologos Allies: Serbian Empire Republic of Venice Republic of Genoa John VI Kantakouzenos Matthew Kantakouzenos Allies: Ottoman emirate