12.4

Chapter: The Attack by Fire 12.4
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Translation:

The proper season is when the weather is very dry; the special days are those when the moon is in the constellations of the Sieve, the Wall, the Wing or the Cross-bar; for these four are all days of rising wind.

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Commentary

The best days for fires are when the trees and ground are dry enough for the fire to easily spread.

Rising winds fan the flames and continued winds keep them going, feeding the fires with new oxygen.

You should also only use fires when the winds will blow the smoke back into the enemy’s eyes and not towards you. It is sometimes forgotten that smoke kills more people than flames, especially in an enclosed environment.