Xiang Yu: Julu and Pengcheng are mythical achievements, but Gaixia lost the support of his officials and the people because of his headstrong and cruel temperament, and finally suffered a fiasco in the "Chu-Han dispute".

Guan Yu: warm wine to chop Hua Xiong, chop Yan Liang, chop Wen Chou; After five passes, six generals will be killed; The Seventh Army flooded China, and from then on, it paid no attention to Dongwu Monroe and Lu Xun, which led to the fall of Jingzhou and the defeat of Maicheng. Finally, even because of his conceit, he died at the hands of Monroe.

Modern:

Japan invaded China! The Japanese Emperor once threatened to destroy China within 1 month. When they really saw the resistance of the people of China, their failure was doomed.

Foreign countries:

Napoleon was imprisoned for his conceit. Elba ...

In Romance of the Three Kingdoms, you can set the protagonist as Cao Cao.