During Alauddin's reign, the Mongol noyan Kadar raided Punjab in the winter of 1297-98. He was defeated and forced to retreat by Alauddin's general Ulugh Khan. A second Mongol invasion led by Saldi was foiled by Alauddin's general Zafar Khan. After this humiliating defeat, the Mongols launched a third invasion, with full preparations, intending to conquer India. In late 1299, Duwa, the ruler of the Mongol Chagatai Khanate, dispatched his son Qutlugh Khwaja to conquer Delhi. The Mongols intended to conquer and govern the Delhi Sultanate, not merely raid it. Therefore, during their 6-month long march to India, they did not resort to plundering cities and destroying forts. When they encamped at Kili near Delhi, the Delhi Sultan Alauddin Khalji led an army to check their advance. Alauddin's general Zafar Khan attacked a Mongol unit led by Hijlak without Alauddin's permission. The Mongols tricked Zafar Khan into following them away from Alauddin's camp, and then ambushed his unit. Before he died, Zafar Khan managed to inflict heavy casualties on the Mongol army. The Mongols decided to retreat after two days. The real reason for the Mongol retreat appears to be that Qutlugh Khwaja was seriously wounded: he died during the return journey.