He Jin () (died 22 September 189), courtesy name Suigao, was a Chinese military general and politician. He was the military Grand Marshal 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. Life He Jin was born into a family of butchers in Nanyang, hometown of the dynastic founder Emperor Guangwu. During the reign of Emperor Ling, his younger half-sister entered the palace and soon became one of the emperor's favourites. In January 181, she was made empress and He Jin henceforth began a speedy escalation up the bureaucratic ladder. When the Yellow Turban Rebellion erupted in 184, He Jin was appointed General-in-Chief (). He commanded the imperial armory, secured strategic forts around the capital and moved quickly to crush the uprising at Luoyang led by Ma Yuanyi (), a follower of the rebel leader, Zhang Jue. The campaign was deemed a success and He Jin was enfeoffed as the Marquis of Shen (). After the rebellion was quelled, He Jin continued in the role of General-in-Chief, technically in control of all the imperial armies. During this time, other members of his family, such as his younger step-brother He Miao (), were also elevated to positions of importance. In 188, perhaps as a counterweight to the power of the He family, Emperor Ling created the Army of the Western Garden. The emperor ostentatiously paraded in front of the army and had himself named "Supreme General" (). The emperor also had the army placed under the command of Jian Shuo, a trusted eunuch. By commanding the Army of the Western