Mount Dingjun
Cao Cao's general Xiahou Yuan was defeated and killed by Liu Bei at the Battle of Mount Dingjun in 219. In retaliation, Cao Cao led a large army to attack Liu Bei's camp at the south of the Han River. Liu Bei sent his generals Zhao Yun and Huang Zhong to defend. Huang Zhong and Zhang Zhu went to destroy the enemy's supplies while Zhao Yun would remain in the camp with Zhang Yi unless they did not return.