Gao Gan
In 206, Cao Cao turned back and personally led his forces to attack Gao Gan. Gao Gan fled from Hu Pass, leaving behind his subordinates Xia Zhao () and Deng Sheng () to defend the pass, and went to seek help from the Xiongnu. After the Xiongnu refused to help him, Gao Gan headed south towards Jing Province to seek aid from Liu Biao, the provincial governor. However, along the way, Wang Yan (), the Colonel-Director of Retainers (), led his troops to intercept Gao Gan and kill him and then present his head to Cao Cao.