The War of the Succession of Stettin was a conflict between the Dukes of Pomerania and the Elector of Brandenburg. It started in 1464, after the death of Duke Otto III, the last Duke of Pomerania-Stettin. The Dukes of Pomerania-Wolgast, Eric II and Wartislaw X, held that they were Otto's rightful heirs. Elector Frederick II of Brandenburg held that Pomerania-Stettin was a fief of Brandenburg. Since its duke, Otto III, had died without a male heir, it should fall back to Brandenburg.