Liu Biao
When the Han dynasty was consumed with war following the Yellow Turban Rebellion in 184, Liu Biao held the governorship of Jing Province (covering present-day Hubei and Hunan). Liu Biao later started a war against the warlord Yuan Shu and his minor vassal, Sun Jian. During the Battle of Xiangyang, Sun Jian was put in command of an army on Yuan Shu's orders to assault Liu Biao in Jing Province. Liu Biao appointed Huang Zu to command the forces against Sun Jian. Huang Zu was outmaneuvered by Sun Jian, but the latter was hit by an arrow and killed, effectively ending the battle in favour of Liu Biao's forces. Years after, Sun Jian's two eldest sons, Sun Ce and Sun Quan, caused Liu Biao no end of trouble as they sought to avenge their father's death. However, they did not cause Liu Biao's demise as they targeted Huang Zu, who was a general under Liu Biao, instead of Liu Biao himself. While Cao Cao (in the north) was gaining strength, Liu Biao chose to neither help nor hinder his conquests, in part because he had been dealt a defeat against the forces of Sun Ce at the Battle of Shaxian.