The use of fire must have a basis, and requires certain tools. There are appropriate times for setting fires, namely when the weather is dry and windy.
Generally, in fire attack it is imperative to follow up on the crises
caused by the fires. When fire is set inside an enemy camp, then respond
quickly from outside. If the soldiers are calm when fire breaks out, wait
-- do not attack. When the fire reaches the height of its power, follow up
if possible, hold back if not.
When fire can be set out in the open, do not wait until it can be set inside a camp -- set it when the time is right.
When fire is set upwind, do not attack downwind.
If it is windy during the day, the wind will stop at night.
Armies must know there are adaptations of the five kinds of fire attack,
and adhere to them scientifically.
So the use of fire to help an attack means clarity, the use of water to
help at attack means strength. Water can cut off, but cannot plunder.
To win in battle or make a successful siege without rewarding the
meritorious is unlucky and earns the name of stinginess. Therefore it is
said that an enlightened government considers this, an good military
leadership rewards merit. They do not mobilize when there is no advantage,
do not act when there is nothing to gain, do not fight when there is no
danger.
A government should not mobilize an army out of anger, military leaders
