Romance of the Three Kingdoms is a classical Chinese novel. Battle of Red Cliff: One of the most famous battles of the Three Kingdoms period marked the collapse of the alliance between Wu and Shu. [2. Empty City Strategy: During the Three Kingdoms period, Cao Cao sent troops to attack an empty city. Sima Yi and the others used the loopholes in the city wall to escape successfully.] 3. Battle of Guandu: Cao Cao led an army to attack Yuan Shao's Guandu. In the end, Yuan Shao's son, Yuan Tan, and others surrendered to Cao Cao, causing Cao Cao to unify the north. 4. Battle of Yiling: An important battle between Shu Han and Dongwu during the Three Kingdoms period. The Shu Han army was defeated in the Battle of Yiling. 5. After the Battle of Red Cliff, Zhuge Liang of Shu Han proposed to divide the world into three parts and compete with Sun Quan of Wu for the world. 6. Guan Yu lost Jingzhou: When Guan Yu attacked Wu, he lost Jingzhou due to carelessness, resulting in the destruction of his army. Liu Bei visited Zhuge Liang three times and finally got Zhuge Liang's help to unify northern China. 8. Cao Cao's death: Cao Cao's death after the Battle of Red Cliff marked the end of the Three Kingdoms period. These chapters had a profound impact on Chinese history and culture.