Yuan Xi
By September or early October, as Cao Cao's army reached the valley of Daling River, Tadun and his allies realized what was happening and hastily withdrew from their prepared positions and gathered to face Cao Cao to the north. With tens of thousands of men gathered, Tadun, along with Yuan Shang, Yuan Xi, and the two Wuhuan chanyus Louban () and Wuyan (), met Cao Cao's army at White Wolf Mountain (白狼山; near present-day Lingyuan, Liaoning).