Where does the east wind of Battle of Red Cliffs come from?

The easterly wind in Battle of Red Cliffs is the weather change, southeast wind.

In the Romance of the Three Kingdoms, Cao Cao said, "It's strange that there is an occasional southeast wind in Jiangdong in the middle of winter."

The biography of the Three Kingdoms and Zhou Yu said: "The right then sent Yu, and so on. Join forces with Bay against Tsao Kung and meet him at Chibi. At that time, Cao's troops were terminally ill. On the first day of the war, the public army was defeated, which was second only to Jiangbei. "

Pei Songzhi, who wrote down his reflection, said, "As for Battle of Red Cliffs, it was luck. In fact, the epidemic is booming and the front is damaged. Kaifeng came to the south, taking this as a burning potential. This is true and embarrassing. "

In other words, it was a southeast wind. But Zhuge Liang didn't borrow it, it was just a coincidence. According to the research of historians, Puyin Chibi, located in the south bank of the Yangtze River and Hubei Province, is the most authoritative one. In Hubei province, it is not uncommon to blow southeast wind in winter. On the other hand, even in the north, the northwest wind doesn't blow every day.

The wind is just a favorable situation for Liu Bei and Zhou Yu to win (Zhuge Liang was not in the front when the history books were uploaded to Battle of Red Cliffs). It is very important that Cao Cao's soldiers were not burned back. The main reason is the plague in Cao Jun, which led to the decline of combat effectiveness. The fire was just a thrill.