Zhang Liao (169–222), courtesy name Wenyuan, was a military general serving under the warlord Cao Cao in the late Eastern Han dynasty. He served briefly in the state of Cao Wei, founded by Cao Cao's successor Cao Pi, in the early Three Kingdoms period before his death. Formerly a subordinate of other warlords such as Ding Yuan, Dong Zhuo and Lü Bu, Zhang Liao joined Cao Cao in around 198 after Lü Bu's downfall at the Battle of Xiapi. Since then, he participated in many of Cao Cao's military campaigns, including those against Yuan Shao's heirs and the Wuhuan tribes from 201–207. He is best known for his pivotal role in the Battle of Xiaoyao Ford in 214–215, in which he successfully defended Hefei from the forces of the warlord Sun Quan.