In this chapter Sun Tzu draws fire as a weapon. Yet the teaching that lasts is not the fire but what comes after it.
First he lists five ways of attacking with fire. People and grain, wagons and stores, whole units. Everything that can burn.
凡火攻有五：一曰火人，二曰火積，三曰火輜，四曰火庫，五曰火隊
fan huo gong you wu, yi yue huo ren, er yue huo ji, san yue huo zi, si yue huo ku, wu yue huo dui
Attack by fire has five forms. The first burns people, the second burns stored grain, the third burns wagons, the fourth burns storehouses, the fifth burns units. (The Art of War, Attack by Fire, translated directly)