In 1511, a pro-Safavid revolt known as the Shahkulu Uprising broke out in Teke. An imperial army that was sent to suppress it, was defeated. Shah Ismail sought to turn the chaos within the Ottoman Empire to his advantage and moved up his borders even more westwards in Asia Minor. The Qizilbash defeated a large Ottoman army under Sinan Pasha. Shocked by this heavy defeat, Sultan Selim I (the new ruler of the Empire) decided to invade Persia with a force of 200,000 Ottomans and face the Qizilbash on their own soil. In addition, he ordered the persecution of Alevis and massacre its adherents in the Ottoman Empire.