Let's talk about Battle of Red Cliffs briefly.

Battle of Red Cliffs: In the 13th year of Jian 'an in the Eastern Han Dynasty, Sun Quan and Liu Bei joined forces to defeat Cao Cao's army in Chibi area of the Yangtze River. After Cao Cao defeated Yuan Shao and Wu Huan and basically unified the north, in July of the 13th year of Jian 'an, he sent troops from Wan to the south, destroyed Liu Biao first, and then moved eastward along the river, defeating Sun Quan, thus unifying the world. In September, when Cao Jun entered the new field, Liu Biao was dead and his son Liu Cong surrendered without a fight. Liu Bei, who was attached to Liu Biao and stationed in Fancheng, quickly led the army and people to withdraw south. Cao Cao incorporated Liu Biao's army, claiming that 800,000 troops were advancing on the Yangtze River. After being defeated, Liu Bei sent Zhuge Liang to Chai Sang to welcome Sun Quan back to China and persuaded Sun Quan to unite against Cao.

Sun Quan appointed Zhou Yu as the general and Cheng Pu as the deputy, and led 30,000 elite water troops to meet Liu Beijun stationed in Fankou. * * * About 50,000 people met Cao Jun along the westbound Yangtze River. In November, Sun Liu and Cao Jun confronted each other in Chibi. Cao Cao connected the warships end to end to drill the water army and wait for an opportunity to attack the war. Zhou Yu adopted the fire attack plan put forward by Huang Gai and asked him to send a letter to Cao Cao to surrender. Cao Cao was trapped. Huang Gai chose a suitable time, led Meng Chong to sail into Junshui Village and set it on fire. Cao Jun's fleet was burned and the fire spread to the camp on the shore. Sun and Liu allied forces took advantage of the situation to attack, and Cao Jun suffered more than half of the casualties. So he led the troops back to the north, leaving the general Coss in the south to stick to Jiangling. The allied forces expanded their victory, and Sun and Liu occupied Jingzhou.

In the decisive battle at Chibi, Cao Cao underestimated the enemy's conceit, made mistakes in command and finally lost. Sun Quan and Liu Bei formed an alliance to resist Japan at the critical moment when the strong enemy advanced, and skillfully attacked with fire, eventually defeating the strong with the weak. This battle laid the foundation for the future separation of Wei, Shu and Wu.