Ashina Helu
After he established himself as qaghan, Ashina Helu led repeated raids on Tang settlements to the east. He also attacked the Tarim Basin, bringing the territory under Turkic rule for the next six years. Emperor Gaozong, the successor of Taizong, responded by sending Tang forces consisting of a main division led by Su Dingfang, and another led by Ashina Mishe and Ashina Buzhen, Western Turk rivals of Ashina Helu.