Guo Tu
During the Battle of Boma in 200, Yuan Shao ordered Yan Liang, with Guo Tu and Chunyu Qiong providing support, to lead troops to attack Boma (白馬; near present-day Hua County, Henan), which was defended by Liu Yan (劉延), a military officer under Yuan Shao's rival Cao Cao. Yan Liang lost the battle and was slain by Guan Yu, who was then a subordinate of Cao Cao.