Sun the Master said:—

Now the requirements of war are such that we need a thousand light chariots with four horses each; a thousand leather-covered chariots, and one hundred thousand armoured men; and we must send supplies to distant fields. Wherefore the cost at home and in the field, the entertainment of guests, glue and lacquer for repairs, and necessities for the upkeep of waggons and armour are such that in one day a thousand pieces of gold are spent. With that amount a force of one hundred thousand men can be raised:— you have the instruments of victory.

But, even if victorious, let the operations long continue, and the soldiers’ ardour decreases, the weapons become worn, and, if a siege be undertaken, strength disappears.

Again, if the war last long, the country’s means do not suffice. Then, when the soldiers are worn out, weapons blunted, strength gone and funds spent, neighbouring princes arise and attack that weakened country. At such a time the wisest man cannot mend the matter.

For, while quick accomplishment has been known to give the victory to the unskilful, the skilful general has never gained advantage from lengthy operations. In fact, there never has been a country which has benefited from a prolonged war.

He who does not know the evils of war will not reap advantage thereby. He who is skilful in war does not make a second levy, does not load his supply waggons thrice.

War material and arms we obtain from home, but food sufficient for the army’s needs can be taken from the enemy.

The cost of supplying the army in distant fields is the chief drain on the resources of a state: if the war be distant, the citizens are impoverished.

In the neighbourhood of an army prices are high, and so the money of the soldiers and followers is used up. Likewise the state funds are exhausted, and frequent levies must be made; the strength of the army is dissipated, money is spent, the citizen’s home swept bare: in all, seven-tenths of his income is forfeited. Again, as regards State property, chariots are broken, horses worn out, armour and helmet, arrow and bow, spear, shield, pike and fighting tower, waggon and oxen used and gone, so that six-tenths of the Government’s income is spent.

Therefore the intelligent general strives to feed on the enemy; one bale of the enemy's rice counts as twenty from our own waggons; one bundle of the enemy’s forage is better than twenty of our own.

Incitement must be given to vanquish the enemy.

They who take advantage of the enemy should be rewarded.

They who are the first to lay their hands on more than ten of the enemy’s chariots should be rewarded; the enemy’s standard on the chariots exchanged for our own; the captured chariots mixed with our own chariots and taken into use.

The accompanying warriors must be treated well, so that, while the enemy is beaten, our side increases in strength,

Now the object of war is victory; not lengthy operations, even skilfully conducted.

The good general is the lord of the people’s lives, the guardian of the country’s welfare.