After Battle of Red Cliffs, the general pattern of the world has been determined. Jiangdong is cut off by the natural barrier of the Yangtze River, and Wu Dong is a civilized and virtuous country. The society is relatively stable and difficult to conquer in a short time. The destruction of the northern warlord forces poses a security risk to Cao Cao. Liu Zhang and Zhang Lu in the west are not strong in fighting capacity. In this case, Cao did not and did not need to launch a large-scale war again.

Battle of Red Cliffs is the symbolic war of the three countries. This war has created a political situation in which the world is divided into three parts. After Battle of Red Cliffs, Cao Cao led his troops back to the north. After years of fighting, the soldiers were exhausted and their supplies were exhausted. Coupled with the plague caused by the war, the combat effectiveness has dropped sharply, and the people urgently need to recuperate. The forces against Cao Cao in Cao Cao's camp have been surging, and Cao Cao also needs to be on guard against becoming an elbow; Ma Sui in the north still needs to be pacified, and Zhang Lu in Hanzhong and Liu Zhang in Xichuan are more important to Sun Quan, Liu Bei and Cao Cao. Therefore, Cao Cao needs to focus on consolidating the existing achievements and stabilizing the internal political situation, and then expand the territory and unify the world.

Dongwu has natural hazards, and the Yangtze River has natural hazards. If Cao Cao wants to capture Dongwu, he must cross the Yangtze River. Ancient science and technology traffic was backward. It is impossible for all Cao Cao's troops to fly over the Yangtze River, so fighting Dongwu must rely on the strength of the water army. Cao Wei's soldiers are mostly northerners, unfamiliar with water warfare, but the Dongwu water army is strong, taking advantage of each other's own disadvantages. This is a taboo in military war. In addition, there are many talents in Dongwu, and Sun Quan also relies on it.

After Battle of Red Cliffs, Liu Bei Group got a breathing space and developed rapidly. It not only annexed Xichuan Liu Zhang, but also made progress in Hanzhong area. Liu Bei won the hearts of the people, Cao Cao lost Hanzhong, and the situation in the world was more stable. Guan Yu soon attacked Xiangfan. These changes in the world situation and war situation threatened Cao Cao, making it impossible for Cao Cao to launch a large-scale merger war.

Twelve years after Battle of Red Cliffs, Cao Cao died of illness, and his children and grandchildren were not as talented as Cao Cao. The pattern of "three points in the world" lasted for nearly half a century, and it was not until 280 AD that the three points were returned to gold that a short-lived unification situation was ushered in.