Lü Bu
Lü Bu killed his patron Ding Yuan at the bequest of Dong Zhuo and became his bodyguard. In 190 Lü Bu was sent to plunder the tombs of Luoyang. His behavior was unruly and disruptive to his unit, causing his commander Hu Zhen to suffer defeat at the hands of Sun Jian. Lü Bu was also defeated and driven from Luoyang. Conflict between Dong Zhuo and Lü Bu soon came to a head and in 192 Lü Bu conspired with Wang Yun to kill Dong Zhuo. After ambushing and killing Dong Zhuo, Wang Yun's government was toppled by Li Jue in less than a month and Lü Bu was forced to flee to Yuan Shu but was turned away because of the unruly behavior of his men. Next Lü Bu visited Zhang Yang and then left when Li Jue offered a price for his head. In 193 he participated in Yuan Shao's campaign against the Black Mountain bandits. Once again the brutality of his men caused upset and Yuan Shao sent Lü Bu back to Luoyang while ordering the escort to kill Lü Bu. Lü Bu managed to avoid assassination and fled. In 194 Lü Bu joined Zhang Chao and Zhang Miao's rebellion against Cao Cao in Yan Province. While initially successful, the rebel forces failed to take Puyang in Dong Commandery, and the tide turned against them. By the summer of 195 Lü Bu was forced to flee again, this time to Liu Bei in Xu Province. In 196 Yuan Shu attacked Liu Bei. Lü Bu switched sides, capturing Liu Bei's assets in Xiapi Commandery, and taking his surrender. After defeating Liu Bei, Lü Bu turned on Yuan Shu and drove back his army. The defeated Liu Bei later fled to Cao Cao, who in 198 sent Xiahou Dun to assist Liu Bei against Lü Bu. Lü Bu was unable to coordinate his commanders, who acted separately, and was driven back to Xiapi Commandery where his officers eventually betrayed him, opening the gates for the opposing army. When Lü Bu tried to persuade Cao Cao to accept him as a subordinate, Liu Bei argued against it. Lü Bu was strangled to death.