Byzantine civil wars
The Byzantine Empire experienced several civil wars throughout its history, often triggered by disputes over succession or power struggles among factions. These conflicts typically involved rival claimants to the throne, leading to significant political instability and military confrontations.
One notable example is the Byzantine civil war of 1341-1347, which arose after the death of Emperor Andronikos III. This war saw a struggle between the regents for the young Emperor John V and various noble factions, ultimately weakening the empire and contributing to its decline.