Byzantine civil war of 1321–1328

Byzantine civil war of 1321–1328
	Part of the Byzantine Civil Wars
	; Byzantine Empire and surrounding territory in 1307, shortly before the First Palaiologan Civil War.
Date	1321–1328
Location	Thrace, Macedonia and Constantinople
Result	Andronikos III becomes co-emperor and finally sole emperor.
Belligerents
Andronikos II Palaiologos; Serbian Kingdom	Andronikos III Palaiologos; Second Bulgarian Empire
Commanders and leaders
Andronikos II; Syrgiannes Palaiologos	Andronikos III; John Kantakouzenos; Theodore Synadenos; Syrgiannes Palaiologos
Strength
Unknown Numerous Bulgarian, Serbian, and Tartar mercenaries; Smaller number of supporters; Population of Constantinople;	Unknown Numerous mercenaries; Younger nobility; Included more supporters, including non-combatants; Population of Thrace and Macedonia;
Casualties and losses
First conflict (1321): unknown; Second conflict (1322): few, or light ; Third conflict (1327–28): possibly heavier, but comparatively light.	Unknown, but also possibly comparatively light
	1 2 Switched sides to Andronikos II in December 1321;

The Byzantine civil war of 1321–1328 was a series of conflicts between the Byzantine emperor Andronikos II Palaiologos and his grandson Andronikos III Palaiologos over control of the Byzantine Empire.