The great battle between the two Bayezid sons occurred on 15. June in Battle of Kosmidion, on the banks of the Golden Horn, in front of the Byzantine land walls of Constantinople. Musa's forces were defeated, and when he left the battlefield, the Despot Stefan pulled back from the battle. He began his departure following the Golden Horn to the Galatians, but the Byzantine emperor Manuel sent ships to pick him up and carried him to Constantinople, although he himself was on the side of Süleyman. Constantinople organized a solemn reception for Stefan, and Manuel used the situation to confirm his title of Despot, and then handed over the crown of despotic dignity. After a short stay in the Byzantine capital, to Stefan and his entourage, including Uglješa Vlatković, with ships headed to Serbia. Through the Black Sea and Danube rivers, and the state of Duke Mirča, they arrived in Golubac in late July or early August of that year.