Yan Liang
In 200, before the Battle of Boma (a prelude to the Battle of Guandu), Ju Shou warned Yuan Shao not to put Yan Liang in charge of leading the attack on Cao Cao's garrison at Boma (白馬; near present-day Hua County, Henan) because Yan Liang was petty and narrow-minded. Yuan Shao ignored him and sent Yan Liang anyway. Yan Liang was killed in action. Before Yuan Shao's main army crossed the Yellow River, Ju Shou advised Yuan Shao to remain at Yan Ford () and send detachments to attack Cao Cao's camp at Guandu () instead of going all-out to attack Guandu. When Yuan Shao did not heed his advice, Ju Shou sighed, claimed that he was ill and refused to meet anyone. Yuan Shao became very unhappy with Ju Shou and he gave command of Ju Shou's units to Guo Tu instead.