The clever combatant looks to the effect of combined energy, and does not require too much from individuals. Hence his ability to pick out the right men and utilize combined energy

Ground which can be freely traversed by both sides is called accessible.

So there are five ways of knowing who will win. Those who know when to fight and when not to fight are victorious. Those who discern when to use many or few troops are victorious. Those whose upper and lower ranks have the same desire are victorious.

The height of strategy, is to attack your opponent's strategy.

Thus the highest form of generalship is to balk the enemy's plans, the next best is to prevent the junction of the enemy's forces, the next in order is to attack the enemy's army in the field, and the worst policy of all is to besiege walled cities.

Fighting with a large army under your command is nowise different from fighting with a small one: it is merely a question of instituting signs and signals.

Concentrate your energy and hoard your strength.