After Battle of Red Cliffs, the forces of Cao Cao, Sun Quan and Liu Bei have undergone new changes. After a long time, the forces are quite equal, and no one can destroy anyone, and it is impossible to complete the reunification of the country by themselves, forming a situation of tripartite confrontation.

Cao Cao, who is also resourceful and decisive, can win more with less in the battle of Guandu, but why did Battle of Red Cliffs win more with less eight years later? Looking for the reasons from the warring sides, it is concluded that Cao Jun is a northerner, unaccustomed to water warfare and unaccustomed to the water. Cao Cao is proud and underestimates his enemy; Zhuge Liang is resourceful; The combination of Sun Quan and Liu Bei has proper strategy and fire attack tactics. Wait a minute. At that time, the objective conditions for unification were not yet mature.