 Complete the following phrase:  Towards the end of the 14th century east of Central Anatolia was under the hegemony of a Turkmen leader named Kadı Burhaneddin. Bayezid I tried to conquer his territory without success. After his death and the short-term Timurid rule, Ottomans faced with a more powerful rival. In the 15th century tribes in the east, were united into a tribal confederation named Akkoyunlu Turkish phrase meaning White Sheep. In 1473, Mehmed II defeated Akkoyunlu sultan Uzun Hasan in the 