The line between disorder and order lies in logistics.

Who can determine where one ends and the other begins?

With regard to narrow passes, if you can occupy them first, let them be strongly garrisoned and await the advent of the enemy.

Therefore a victorious army first wins and then seeks battle; a defeated army first battles and then seeks victory.

When strong, avoid them. If of high morale, depress them. Seem humble to fill them with conceit. If at ease, exhaust them. If united, separate them. Attack their weaknesses. Emerge to their surprise.

The end and aim of spying in all its five varieties is knowledge of the enemy; and this knowledge can only be derived, in the first instance, from the converted spy. Hence it is essential that the converted spy be treated with the utmost liberality.

There are roads which must not be followed, armies which must not be attacked, towns which must not be besieged, positions which must not be contested, commands of the sovereign which must not be obeyed.