The weather in Chibi, Hubei Province

Battle of Red Cliffs and Cao Cao had many advisers, but they didn't expect each other to attack with fire. This is because Cao Cao has lived in the north for a long time, without considering the climate change in the south, and it is impossible to imagine that the other party will take advantage of the weather. In addition, after Cao Cao occupied Jingzhou and unified the north, he was even more proud. He thought his victory was inevitable, but he failed because he was too confident. This overconfidence also led to Huang Gai's failure to find the real reason after his surrender, which gave the allies a chance to get close to their own camp and led to failure.

First, northerners don't understand the climate in the south. Cao Wei occupied the northern region, and the Red Cliff of the Yangtze River occurred in the present Red Cliff of the Yangtze River. In today's Hubei province, an army that has lived in the north for a long time will definitely have some discomfort in the south. That's why Cao Caocai connected the boats and let the soldiers get used to this way of fighting. But northerners are always northerners. They can't predict the change of climate, so of course they don't know the change of wind direction, so no one in Battle of Red Cliffs would think of attacking with fire.

Second, the strength of the two sides is very different. In principle, Cao Cao's army is much more than Wu Dong's. He thought that Sun Quan would surrender in Battle of Red Cliffs without a fight. After all, when the world is divided into three parts, Cao Cao's power is the strongest, while Wu Dong's power does not seem to be strong. In addition, after Cao Cao occupied Jingzhou, his confidence increased greatly, and he felt that several places were struggling after Wu Dong, and his victory was inevitable, which also gave the counselor information, regardless of so many factors.

Third, the risk of Cao Cao falling in love with Zhou Yu Huang Gai. Cao Cao is a talented person. Zhou Yu played Huang Gai and gave Cao Cao a good play. But Cao Cao really believed that Huang Gai had come to defect, so he didn't doubt Huang Gai. But it was because of this trust that Huang Gai's ship approached and gave the allies an opportunity. The fire spread, so Battle of Red Cliffs will fail. These unexpected factors are, of course, unexpected for counselors.