Zhu Jun (late 140s[3] - c.April 195[4]), courtesy name Gongwei, was a military general and official who lived during the Eastern Han dynasty of China.
In c.February 178,[9] when a rebellion broke out in Jiaozhi Commandery in the far south, the Han imperial court appointed Zhu Jun as the Inspector (刺史) of Jiao Province and ordered him to suppress the revolt.
Zhu Jun and Huangfu Song later joined forces to defeat the rebels at Yangzhai (陽翟) and Xihua (西華) counties and pacified Yu Province.
Zhu Jun subsequently held the following appointments: Household Counsellor (光祿大夫), Colonel of the City Gates (城門校尉) and Intendant of Henan (河南尹).
In 189, the warlord Dong Zhuo took advantage of the political vacuum created in the aftermath of Emperor Ling's death to seize control of, and dominate the Han central government.
At the time, much of Luoyang had been burnt down when Dong Zhuo gave orders to relocate the imperial capital to Chang'an, so Zhu Jun moved to a garrison at Zhongmu County (中牟縣).
However, Zhu Jun was defeated by Dong Zhuo's subordinates Li Jue and Guo Si in battle, so he could not advance further west and remained in Zhongmu County.
However, within months, Dong Zhuo's former followers (led by Li Jue and Guo Si) attacked Chang'an and seized control of the central government.
Tao Qian contacted other regional officials and warlords and proposed naming Zhu Jun as Grand Preceptor (太師) to lead them to attack Chang'an and free Emperor Xian from Li Jue and Guo Si's control.
At the same time, Li Jue and Guo Si also tried to win Zhu Jun over to their side: they sent him an imperial edict in Emperor Xian's name, ordering him to head to Chang'an and serve as Minister Coachman (太僕) in the central government.
In the following year, he was removed from office and reassigned to be acting General of Agile Cavalry (驃騎將軍) to guard Hangu Pass.
In early 195, before Zhu Jun left for Hangu Pass, internal conflict broke out between Li Jue and Guo Si, who started attacking each other in the streets of Chang'an.