Career

He was born Baha-ud-Din Osman and later given the nickname Qara Iluk or Qara Yuluk meaning The Black Leech. When Timur invaded the Caucasus and eastern Anatolia, the Aq Qoyunlu sided with him in support and fought alongside the Timurids against the Ottomans. Foreign his services Qara Osman was given Diyarbakır in 1402.