Battle of Otlukbeli
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The Battle of Otlukbeli or Otluk Beli was fought between Aq Qoyunlu and the Ottoman Empire on August 11, 1473. Wikipedia
Date: August 11, 1473
70,000–100,000 Or 85,000 (60,000 armored soldiers, 25,000 Janissaries): 70,000–300,000; Or 200,000 (mostly cavalry)
Ottoman Empire: Aq Qoyunlu; Timurids; Qara Qoyunlu