Dong Yun (died December 246), courtesy name Xiuzhao, was a Chinese general and politician of the state of Shu Han during the Three Kingdoms period of China. His father, Dong He, also served as an official in Shu. Dong Yun was one of four persons who held positions equivalent to a head of government in Shu from 221 to 253; the other three were Zhuge Liang, Jiang Wan and Fei Yi. Family background Dong Yun's ancestors were originally from Jiangzhou (江州; in present-day Chongqing), but they migrated to Zhijiang County () in Nan Commandery (), which is present-day Zhijiang, Hubei, and designated Zhijiang as their ancestral home. Dong Yun's father, Dong He, previously served as an official under Liu Zhang, the Governor of Yi Province (covering present-day Sichuan and Chongqing), during the late Eastern Han dynasty before switching allegiance to Liu Bei, the founding emperor of the state of Shu during the Three Kingdoms period. As an attendant to the crown prince In 221, after Liu Bei named his son Liu Shan as his crown prince, he appointed Dong Yun as an attendant to the newly anointed heir apparent. Earning praise from Zhuge Liang After Liu Shan became emperor of Shu in 223 following his father's death, he appointed Dong Yun as a Gentleman of the Yellow Gate (). In 227, Zhuge Liang, the Imperial Chancellor of Shu, mobilised military forces from throughout Shu in preparation for a large-scale campaign against Shu's rival state Wei in the following year. As the troops gathered at the staging area in Hanzhong Commandery, Zhuge Liang was worried that Liu Shan was still young and not mature enough to make good judgments. He thus decided to put Dong Yun in charge of internal affairs in the Shu capital Chengdu because he believed that Dong Yun would perform his duties in a professional and impartial manner. In his Chu Shi Biao (literally "memorial on the case to go to war"), Zhuge Liang named Dong Yun, Fei Yi and Guo Youzhi as examples of trustworthy, loyal and competent officials who could provide good advice and assist Liu Shan in governing Shu more effectively. As a Palace Attendant Not long later, Zhuge Liang nominated Dong Yun to serve as a Palace Attendant (), commissioned him as a General of the Household () and put him in command of the huben division of the imperial guards. As his