Defeat the enemies strategy.
If the enemy opens the door, you must race in.
Thus the skilful general conducts his army just as though he were leading a single man, willy-nilly, by the hand.
Hence the saying: One may know how to conquer without being able to do it.
No nation has ever benefited from a prolonged war.
Management of many is the same as management of few. It is a matter of organization.