need to secure his sources of supply and he plotted to seize Han's lands. Yuan collaborated with Gongsun Zan secretly to attack Han Fu's Ji Province (冀州) and eventually Han surrendered Ji Province to Yuan. Yuan Shao sent Zhou Yu (Renming) (周喁) to attack Sun Jian, who was returning from Luoyang to join Yuan Shu. In the Battle of Yangcheng, Zhou made a surprise attack on Sun's camp at Yangcheng and captured it. Yuan Shu sent Gongsun Yue (公孫越) to assist Sun Jian in fighting Zhou Yu. Gongsun Yue was killed in the battle even though it was a victory for Sun Jian. Gongsun Zan held Yuan Shao responsible for Gongsun Yue's death and declared war on Yuan Shao, which led to the Battle of Jieqiao subsequently. By then, the coalition had failed and collapsed, existing only in name. Death of Dong Zhuo For the following year, the warlords ceased to take any action against Dong Zhuo. Dong occasionally sent an army to attack the warlord Zhu Jun and plundered his territory. Dong Zhuo returned to his tyrant status in the imperial court, but he had become less tolerant towards dissent, as any official who uttered a slight offensive remark would be killed immediately. He installed all members of his clan and relatives by marriage in high-ranking official posts. Even his infant sons were conferred titles of marquises and played with gold seals and purple tassels. Court officials Wang Yun, Huang Wan (黃琬), Shisun Rui (士孫瑞) and Yang Zan (楊瓚) plotted to assassinate Dong Zhuo. They persuaded Lü Bu to join their cause because Lü's relationship with Dong was becoming increasingly strained after Dong threw a hand-axe at him and due to his affair with one of Dong's chambermaids. On 22 May 192, Dong Zhuo was on the way to an assembly in his chariot when Li Su advanced towards him and stabbed him. Dong shouted for Lü Bu to protect him, but Lü killed him instead. Dong's relatives were executed after his death while his corpse was left exposed on the streets of Chang'an. The officer guarding the corpse lit a wick on the navel and it burned for days on the fats of the corpse. After Dong Zhuo's death, several of his loyalists, such as Fan Chou, Guo Si and Li Jue, escaped as they believed that their loyalty towards Dong Zhuo would be considered as treason. Wang