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Some time after returning to Tabriz after successfully completing his campaigns in Khorasan and Turkestan,[5] Shah Ismail received a new letter from the ruler of Diyarbakır, Muhammad Khan Ustacli. In this letter, Muhammad Khan informed about the troubles that Shahzadeh Selim, son of the Ottoman Sultan Sultan Bayezid, was causing along the western borders of the Safavid Empire.[6][7][8]
According to Muhammad Khan, Prince Selim gathered a large army and attacked the Garahamid fortress with Mustafa Pasha. At that time, Muhammad Khan Ustajli was ill, so his brother Garakhan allowed him to go out to meet the Ottoman troops with a detachment of 10–12 thousand people. After that, Gara Khan dealt a major blow to the Ottoman army. According to sources who learned that Gara Khan had crossed the border, the sultan's troops were forced to return after failing to achieve their intentions.[1] This operation lasted only 15 days. Shah Ismail was extremely angry at this news and in a letter he sent to Muhammad Khan demanded that if Prince Selim attacked the Safavid borders again, he immediately send him a message. Shah Ismail declared that he would personally come and cut off the face of the Ottoman sultan's son and scalp him. However, Shah Ismail also considered it appropriate to write a letter to the Ottoman sultan. The letter and valuable gifts were given to Suleiman Yasawul to go as an envoy to the Sultan's palace and deliver the letter and gifts to the Ottoman Sultan. The gifts included part of the booty taken from Abulkhair Khan, a piece of Genghis Khan's banner, and the blood-stained throne of Abulkhair Khan.[3]