Introduction：In the first year of the Jianchu period of the Eastern Han Dynasty, the Northern Xiongnu took the opportunity to annex the Western Regions and control the Silk Road. In order to reopen the Silk Road, the Han court sent Ban Chao as an envoy to the Western Regions. Faced with the barbaric plunder of the Northern Xiongnu, Fake Sima Geng Gong led the Han army's warriors to capture them in one fell swoopObtained the title of Prince of the Northern Xiongnu, made great contributions, and was promoted to be stationed in Jinpu City, the former royal headquarters of the Garrison. The Northern Xiongnu Chanyu was furious and ordered 20000 elite iron cavalry to kill Jinpu City. At this time, there were only over 300 people brought by Geng Gong in the cityCan be challenged. At the critical moment of life and death, Geng Gong made a decisive decision and turned to defend the easily defended and difficult to attack Shule City, where he launched an eternal battle of thirteen brave generals bathing in blood in a lonely city!