List of emperors of the Han dynasty
The Han dynasty was founded by the peasant rebel leader (Liu Bang), known posthumously as Emperor Gao ("r". 202 –195 BC) or Gaodi. The longest reigning emperor of the dynasty was Emperor Wu ("r". 141–87 BC), or Wudi, who reigned for 54 years. The dynasty was briefly interrupted by the Xin dynasty of the former regent Wang Mang, but he was overthrown in 23 AD and the Han dynasty was reestablished by Liu Xiu, known posthumously as Emperor Guangwu (r. 25–57 AD), or Guangwu Di. The last Han emperor, Emperor Xian ("r". 189–220 AD), was a puppet monarch of Chancellor Cao Cao (155–220 AD), who dominated the court and was made King of Wei. In 220 AD, Cao's son Pi usurped the throne as Emperor Wen of Wei ("r". 220–226 AD) and ended the Han dynasty.
He Jin
He Jin () (died 22 September 189), courtesy name Suigao, was a military general and regent of the late Eastern Han dynasty of China. He was an elder half-brother of Empress He, the empress consort of Emperor Ling, and a maternal uncle of Emperor Shao. In 189, he and his sister shared power as regents when the young Emperor Shao was put on the throne following Emperor Ling's death. During the time, the conflict between He Jin and the influential eunuch faction intensified. The eunuch faction lured He Jin into a trap in the imperial palace and assassinated him. While He Jin's subordinates slaughtered the eunuch faction in revenge, the warlord Dong Zhuo took advantage of the power vacuum to enter the imperial capital Luoyang and seize control of the Han central government. The subsequent breakdown of central command brought forth the beginning of massive civil wars which led to the end of the Han dynasty and the start of the Three Kingdoms period.