Zhuge Liang prays for the Eastern Wind

The event where Zhuge Liang prays for the Eastern Wind is a fictional event from the novel Romance of the Three Kingdoms by Luo Guanzhong. The event was part of the Battle of Chibi.

When all preperations for the fire attack on Cao Cao's fleet were made, Zhou Yu noticed the wind was not in his favour and instead might set his own ships on fire. Zhuge Liang volunteered to pray on an altar for the Eastern Wind to blow and it later did.

What happened historically?

 * The region in which the Battle of Chibi took place, the southern Jiangnan region, was prone to eastern winds.
 * Historical records do not mention Zhuge Liang praying for the wind.