The famous battles that took place during the Qin, Han, Three Kingdoms, and Wei and Jin Dynasties included: 1. Battle of Guandu: Cao Cao led his army to defeat Yuan Shao's son Yuan Tan and the Hebei rebel army in the Battle of Guandu. 2. Battle of Red Cliff: Sun Quan and Liu Bei's alliance defeated Cao Cao's army in the Battle of Red Cliff. 3. Battle of Yiling: Liu Bei's army defeated Sun Quan's army in the Battle of Yiling. 4. Battle of Liaodong: Gongsun Yuan's army defeated Cao Cao's army in the Battle of Liaodong. 5. Battle of Hanzhong: Liu Bei's army defeated Cao Cao's army in the Battle of Hanzhong. After the Battle of Red Cliff, Sun Quan led his army to the south and defeated the Wu army in Dongting Lake and other places, winning a series of victories. These battles had a profound impact on the political and military situation at that time, and they were also one of the famous wars in Chinese history.