Zhuge Liang’s Astronomy and Geography

Zhuge Liang’s plan to burn Sima Yi was successful in terms of strategy, but he did not consider the negative impact of the terrain at the time.

In order to completely annihilate the enemy, he led the enemy into a valley shaped like a basin, then sealed the exit and set it on fire. Up to this point, there was no problem.

But then, as the fire spread, the temperature at the valley floor rose, and the air accumulated in the moist valley floor heated up. A large amount of hot air rises to the top of the mountain, cools down when cooled, and accumulates to form precipitation clouds, which then precipitate into rain.

This does not happen in all places, but the season, location, and weather at the time of this battle meet the conditions for the formation of this phenomenon, so the possibility of rainfall can be said to be very high.

If Zhuge Liang is really as magical as in the novel, it is indeed a mistake for him not to calculate this. Or it could be said to be an adventure. Maybe this is more in line with Zhuge Liang's style. Knowing that Guan Yu valued justice, he would probably let Cao Cao go and let him garrison Huarong Road. Knowing that Ma Su was too conceited and might be willful, he sent Cao Cao anyway. He went to the street guard booth. Maybe he was gambling, and he won some bets and lost some bets. After all, military advisors are not gods. If they could calculate everything, Liu Guan and Zhang would not be dead, and they would have unified the world long ago.