The Battle of Chapakchur (Turkish:Sancak Muharebesi; Azerbaijani:Səncəq döyüşü) was a decisive battle fought between Qara Qoyunlu (Black Sheep Turkomen) under the leadership of Jahan Shah and Aq Qoyunlu (White Sheep Turkomen) under the leadership of Uzun Hasan. Jahan Shah was defeated by Uzun Hasan in a battle near the sanjak of Çapakçur in present-day eastern Turkey on October 30 (or November 11), 1467.