The joint forces commanded by Duman quickly defeated the Tang vassal Yutian (于田, in modern Hotan, Xinjiang). In winter 659, Emperor Gaozong sent Su Dingfang against Duman, and once he arrived in the vicinity of Duman's army, he selected 10,000 infantry soldiers and 3,000 cavalry soldiers and made a surprise attack on Duman. When he arrived at Duman's headquarters, Duman was surprised, and after Su initially defeated Duman, Duman was forced to withdraw within the city.
The military campaign led by Duman resulted in the swift defeat of the Tang vassal Yutian (于田, in modern Hotan, Xinjiang). In winter 659, Emperor Gaozong sent Su Dingfang to confront Duman, and upon his arrival near Duman's army, he selected a force of 10,000 infantry soldiers and 3,000 cavalrymen to launch a surprise attack on Duman. When he reached Duman's headquarters, Duman was caught unprepared, and after Su initially triumphed over him, Duman was forced to retreat into the city.