The Byzantine Civil War refers to a series of conflicts within the Byzantine Empire that occurred during the 11th and 12th centuries. These wars were primarily fought over the imperial throne, often involving rival factions and military leaders. The most notable civil wars include the Byzantine Civil War of 1341-1347 and the Byzantine Civil War of 1321-1328, which were marked by power struggles and political intrigue. These conflicts weakened the empire, leading to internal divisions and making it more vulnerable to external threats. The civil wars often resulted in significant changes in leadership and governance, impacting the stability and territorial integrity of the Byzantine Empire.