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Byzantine civil war of 1341–1347

Byzantine civil war of 1341–1347
Part of the Byzantine civil wars, the Byzantine–Serbian wars and the Byzantine–Turkish wars
Date September 1341 – 8 February 1347
Location Thessaly, Macedonia, Thrace, and Constantinople
Result John VI Kantakouzenos defeats regents, and is recognized as senior emperor
Territorial
changes
Serbs gain Macedonia (except Thessalonica) and Albania, and soon after Epirus and Thessaly, establishing the Serbian Empire; Bulgarians gain parts of northern Thrace
Belligerents
Byzantine Empire John V Palaiologos
Regents:
Byzantine Empire Anna of Savoy
Byzantine Empire John XIV Kalekas
Byzantine Empire Alexios Apokaukos
Allies:
 Zealots of Thessalonica
Serbian Empire Serbia (1343–1347)
Coat of arms of the Second Bulgarian Empire.svgBulgaria
 Principality of Karvuna
Byzantine Empire John VI Kantakouzenos
Allies:
Serbian Empire Serbia (1342–1343)
Beylik of Aydin (1342/3–1345)
Ottoman Empire Ottoman beylik (1345–1347)
 Beylik of Saruhan
Commanders and leaders
Byzantine Empire Alexios Apokaukos
Serbian Empire Stefan IV Dušan
Serbian Empire Gregory Preljub
Coat of arms of the Second Bulgarian Empire.svgIvan Alexander
 Momchil (1344–1345)
Byzantine Empire John VI Kantakouzenos
Byzantine Empire Manuel Kantakouzenos
Byzantine Empire John Angelos
Serbian Empire Stefan IV Dušan
Serbian Empire Hrelja
Umur Bey
Ottoman Empire Orhan

The Byzantine civil war of 1341–47, sometimes referred to as the Second Palaiologan Civil War, was a conflict that broke out after the death of Andronikos III Palaiologos over the guardianship of his nine-year-old son and heir, John V Palaiologos. It pitted on the one hand Andronikos III's chief minister, John VI Kantakouzenos, and on the other the Empress-Dowager Anna of Savoy, the Patriarch of Constantinople John XIV Kalekas, and the megas doux Alexios Apokaukos. The war polarized Byzantine society along class lines, with the aristocracy backing Kantakouzenos and the lower and middle classes supporting the regency. To a lesser extent, the conflict acquired religious overtones. Byzantium was embroiled in the Hesychast controversy, and adherence to the mystical doctrine of Hesychasm was often equated with support for Kantakouzenos.

As the chief aide and closest friend of Emperor Andronikos III, Kantakouzenos became regent for the underage John V upon the Emperor's death in June 1341. While Kantakouzenos was absent from Constantinople in September the same year, a coup d'état led by Alexios Apokaukos and the Patriarch John XIV secured the support of Empress Anna and established a new regency. In response, Kantakouzenos' army and supporters proclaimed him co-emperor in October, cementing the rift between himself and the new regency. The split immediately escalated into armed conflict.

During the first years of the war, forces of the new regency prevailed. In the wake of several anti-aristocratic uprisings, most notably that of the Zealots in Thessalonica, a majority of the cities in Thrace and Macedonia came under regency control. With assistance from Stefan Dušan of Serbia and Umur Beg of Aydin, Kantakouzenos successfully reversed these gains. By 1345, despite Dušan's defection to the opposition and the withdrawal of Umur, Kantakouzenos retained the upper hand through the assistance of Orhan, ruler of the Ottoman emirate. The June 1345 murder of megas doux Apokaukos, the regency's chief administrator, dealt the regency a severe blow. Formally crowned as emperor in Adrianople in 1346, Kantakouzenos entered Constantinople on 3 February 1347. By agreement, he was to rule for ten years as the senior emperor and regent for John V, until the boy came of age and ruled alongside him. Despite this apparent victory, subsequent resumption of the civil war forced John VI Kantakouzenos to abdicate and retire to become a monk in 1354.


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