Gongsun Zan
After Gongsun Xu left, Gongsun Zan had sent a message to his son, instructing him to lay an ambush of 5,000 elite cavalry on low ground north of Yijing. They would then signal to Gongsun Zan to charge out of Yijing with his troops and surround Yuan Shao's troops. However, Yuan Shao's troops caught the messenger and laid their own troops in ambush. Yuan Shao's forces then signalled Gongsun Zan and lured him into the ambush, where they routed his troops and forced him to return to Yijing. Yuan Shao's troops followed up their success by digging tunnels under Yijing and then supporting them with beams, which they later torched. The tunnel went into the centre of Yijing and its collapse caused Gongsun Zan's towers to crumble as well. Realising his doom, Gongsun Zan killed his sisters and wives and committed suicide by self-immolation. Yuan Shao's men climbed into the citadel and cut off Gongsun Zan's head, which was sent to Xuchang to report Yuan Shao's victory to the imperial court.