During the expeditionary force, the contradiction between Du Yuming and Sun Liren had already germinated.
Both are classmates of Whampoa Phase I, and Zheng Dongguo is also one of them. However, their philosophies are in conflict. Sun Liren holds a foreign diploma, which makes him have a lot of differences with his classmates in the first phase of Whampoa.
This disagreement eventually turned into a conflict between him and Du Yuming.
Sun Liren"American edge"found resonance in Stilwell, commander-in-chief of the U.S. forces in the China-Burma-India theater. Stilwell is Marshall's hardcore younger brother, and Marshall and Sun Liren are also alumni of the Virginia Military Academy in the United States.
This connection brought Sun and Stilwell closer. It is worth mentioning that Stilwell was not optimistic about Chiang Kai-shek, which became one of the reasons for the tension between Chiang Kai-shek and Sun Liren.
Du Yuming and Zheng Dongguo were extremely loyal to Chiang Kai-shek, while Sun Liren was estranged from Chiang, which further deepened the contradictions between them.
During an expedition, Du Yuming ordered Sun Liren to break off, but Sun Liren refused to carry it out, which led to a rift between the two. There are many arguments about this matter, but in any case, the contradiction between Du Yuming and Sun Liren kicked off.
During the War of Liberation, both sides were sending troops to the Northeast to compete for control of the Northeast. During this time, Sun Liren received an invitation from Britain to accept the award and went to the United States, which made Du Yuming and Zheng Dongguo feel disappointed.
After the outbreak of the Northeast War, ** sent the ace New Sixth Army and the New First Army, including Du Yuming, Zheng Dongguo, Liao Yaoxiang, etc., but because Sun Liren did not return, the performance of the New First Army was relatively weak, which made Du Yuming angry.
Du Yuming and Zheng Dongguo repeatedly persuaded Sun Liren to return to the front, but Sun Liren insisted on stopping for three days, believing that the troops were tired.
This made Du Yuming's attitude towards Sun Liren even more dissatisfied. After Sun Liren returned, he failed to change the situation of the battle, which made Du Yuming even more anxious.
In Sun Liren's eyes, Du Yuming was timid and improperly commanded, resulting in heavy losses for the troops. He believes that Sun Liren's view of the war situation in the Northeast is more realistic, while Du Yuming is part of the internal rift.
In this civil war between the Kuomintang and the Communist Party, the contradictions between Du Yuming and Sun Liren became more and more intense, and the accusations of each other on both sides continued to escalate.
Sun Liren believed that Du Yuming was unworthy of being a commander, and Du Yuming expressed dissatisfaction with Sun Liren's command style. The conflict between the two eventually evolved into doubts and accusations about each other's abilities.