Guo Si
After Dong Zhuo's death, his followers in Liang Province, led by Li Jue, Guo Si and others, formed an army to attack Chang'an when Wang Yun refused to grant them amnesty for their past activities under Dong Zhuo. Guo Si led his men to attack the city's north gate, where he met Lü Bu, who told him, "Let's not send our soldiers into battle. Instead, let's have a man-on-man fight." Lü Bu then engaged Guo Si in a duel and injured him. Guo Si's men saved their superior. Both sides withdrew their forces. Lü Bu was unable to resist the enemy so he eventually abandoned Chang'an and fled. His defeat and subsequent flight took place 60 days after Dong Zhuo's death.