After the conquest of Constantinople in 1453, the Ottoman sultan Mehmed II continued his campaigns in Europe. His first moves against Serbia and Hungary sparked another conflitct against John (Janos) Hunyadi and culminated at the siege of Belgrade in 1456. In the next decade Mehmed conquered the remnants of the Eastern Roman Empire in Morea and Trapezund, ended the independence of Serbia and Bosnia and also fought a war against Vlad Tepes of Wallachia. Vlad and Mehmed fought near Targoviste in 1462. To the East a new Turkic state- Akkoyunlu was gaining power and Mehmed was forced to defend his interests in Eastern Anatolia against the Akkoyunlu Sultan Uzun Hasan.
