Yuan Shao led a good soldier to attack Cao Cao south, and Cao Cao took Yan Liang as a diversion. The two armies confronted each other in Guandu for several months. Cao Caobing was tired of food and wanted to return to Xudu. Yu Xun believes that the withdrawal will fail; However, Yuan Jun underestimated his enemies, and internal discord will change for a long time. Without saying anything, Cao Cao led elite troops to burn Wu Chao's grain depot. Cao Cao attacked on all fronts, Yuan Shao's army was defeated, and Yuan Shao fled north.

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The significance of the battle of Guandu:

The battle of Guandu was a key battle to change the forces of Yuan and Cao, which made the northern part of China move from division to unification at that time, and it had an extremely important impact on the development of the history of the Three Kingdoms. Cao Jun's victory in this war was not accidental. Although the Yuan-Cao merger war was a struggle between feudal separatist forces, it achieved regional unity and objectively met the wishes of the people.

The battle of Guandu was a famous battle in the history of China and even at the end of Han Dynasty, and it was also a turning point for Cao Cao and Yuan Shao to compete for northern hegemony. After Guandu World War I, Cao Cao finally reversed his previous disadvantage to Yuan Shao and laid the foundation for his unification of the North.