End of the Han dynasty
The end of the Han dynasty refers to the period of Chinese history from 189 to 220 AD, which roughly coincides with the tumultuous reign of the Han dynasty's last ruler, Emperor Xian. During this period, the country was thrown into turmoil by the Yellow Turban Rebellion (184–205). Meanwhile, the Han Empire's institutions were destroyed by the warlord Dong Zhuo, and fractured into regional regimes ruled by various warlords, some of whom were nobles and officials of the Han imperial court. Eventually, one of those warlords, Cao Cao, was able to gradually reunify the empire, ostensibly under Emperor Xian's rule, but the empire was actually controlled by Cao Cao himself. Cao Cao's efforts to completely reunite the Han empire were rebuffed at the Battle of Red Cliffs in 208 / 209, when his armies were defeated by the allied forces of Sun Quan and Liu Bei. The Han dynasty formally ended in 220 when Cao Cao's son and heir, Cao Pi, pressured Emperor Xian into abdicating in his favour. Cao Pi became the emperor of a new state, Cao Wei. A year later, in response to Cao Pi's usurpation of the Han throne, Liu Bei declared himself emperor of Shu Han; and in 229, Sun Quan followed suit, declaring himself emperor of Eastern Wu. The period from Emperor Xian's abdication in 220 to the partial reunification of China under the Jin dynasty in 265 was known as the Three Kingdoms era in Chinese history.
Liu Yao (warlord)
Liu Yao (157–198), courtesy name Zhengli, was a provincial governor and warlord who lived during the late Eastern Han dynasty of China. He was a descendant of Liu Fei, the eldest son of the Han dynasty's founding emperor, Liu Bang (Emperor Gao). When he was 18, he became famous after rescuing a relative who was being held hostage by bandits. He started his career in the Han civil service after being nominated as a "xiaolian", and was known for his incorruptibility. In 194, although he was appointed by the Han imperial court as the governor of Yang Province, he barely managed to gain a foothold over his jurisdiction because the warlord Yuan Shu controlled a large part of the territories around the Huai River region in Yang Province. In 195, conflict broke out between Liu Yao and Yuan Shu, who sent his ally Sun Ce to attack Liu Yao. Sun Ce defeated Liu Yao and forced him to retreat south into present-day Jiangxi, where Liu Yao defeated a minor warlord Ze Rong and died of illness shortly later.