From the fifth year of Xianning (279) to the sixth year of Xianning (280), Sima Yan, the emperor of the Western Jin Dynasty, destroyed Eastern Wu and unified the three divisions. Interestingly, the biggest obstacle to Sima Yan's destruction of Eastern Wu was not the resistance of Eastern Wu, but the opposition of the Western Jin Dynasty heroes led by Jia Chong and Xun Xun.
Sima Yan prepared to cut down Wu after the Wei Dynasty, but was strongly opposed by the heroes. When Eastern Wu fell, Jia Chong also wrote a letter to Sima Yan requesting the immediate withdrawal of the Wu army, making a big joke. So why did the founding heroes of the Western Jin Dynasty, represented by Jia Chong and Xun Xun, strongly oppose wu?
First of all, the military threat of the Western Jin Dynasty at that time was not only eastern Wu, many surrounding ethnic minority regimes were also threatening the Western Jin Dynasty, and the "Five Hu Chaohua" had already appeared as a sign. Jia Chong, Xun Xun, and others believed that the unstable situation in the rear was not suitable for cutting down Wu, but this was only a secondary reason for their opposition to cutting Down Wu.
Secondly, in the decades before the Western Jin Dynasty destroyed Wu, Cao Wei and the Western Jin Dynasty failed many attacks on Eastern Wu, including the Battle of Chibi and the Battle of Dongxing. Therefore, Jia Chong, Xun Xun and others with poor military ability believed that Eastern Wu could not perish, and that cutting Down Wu was looking for death.
In the end, the Jiangshan of the Western Jin Dynasty was not fought by Sima Shi, but by usurping Cao Wei, and Jia Chong and Xun Xun became founding heroes by taking sides and conspiring infighting, not military merit. Similar to sima shi's throne, the heroes of Jia Chong and Xun Xun were also unstable.
Therefore, the Western Jin Dynasty heroes represented by Jia Chong and Xun Xun were very worried about the rise of the real military ministers, which would damage their vested interests. At that time, the most likely war to emerge a large number of military ministers was the war to eliminate Wu, and Jia Chong and Xun Xun, the founding heroes of the country, naturally strongly opposed the cutting of Wu.
On the whole, the interests of Jia Chong and Xun Xun, the founding heroes of the Western Jin Dynasty, were a great threat, plus other factors, so they strongly opposed the cutting of Wu. After the fall of Eastern Wu, several Western Jin Dynasty heroes who destroyed Wu were ostracized and even framed to varying degrees.