The Bosporan Civil War was a war of succession that happened in the Bosporan Kingdom somewhere between 311 and 308 BCE and lasted for about a year. The casus belli was the death of archon Paerisades I, whose sons disputed the succession. These sons were Satyros II, who claimed the kingdom by virtue of being the eldest, Eumelos, who was another claimant to the throne, and Prytanis, who engaged in battle later on in support of Satyros.