 The Aq Qoyunlu Turkomans first acquired land in 1402, when Timur granted them all of Diyar Bakr in present-day Turkey.For a long time, the Aq Qoyunlu were unable to expand their territory, as the rival Kara Koyunlu or "Black Sheep Turkomans" kept them at bay.However, this changed with the rule of Uzun Hasan, who defeated the Black Sheep Turkoman leader Jahān Shāh in 1467.