Despotate of the Morea
He then accompanied Demetrios to his post as governor of Lemnos, and followed him to the Despotate of the Morea after that. In 1452, he scored a victory over an Ottoman army under Ahmet Bey at Leontari, by luring it into a narrow defile. Most of the Turks fell, and Ahmet Bey himself was captured.