Yan Liang
Only after Liu Bei's defeat did Yuan Shao start implementing his plan to attack Cao Cao, but this time Tian Feng opposed his decision, saying that their opportunity had passed. Yuan Shao became annoyed with Tian Feng and had Tian imprisoned, after which he led his army south to attack Cao Cao. At the Battle of Boma, Yuan Shao's general Yan Liang was slain by Guan Yu while another of Yuan's generals, Wen Chou, was killed in action against Cao Cao's forces. The morale of Yuan Shao's army was greatly affected by the loss of the two generals.