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[Chang Yu attempts to explain the sequence of chapters as

follows: "Chapter IV, on Tactical Dispositions, treated of the

offensive and the defensive; chapter V, on Energy, dealt with

direct and indirect methods. The good general acquaints himself

first with the theory of attack and defence, and then turns his

attention to direct and indirect methods. He studies the art of

varying and combining these two methods before proceeding to the

subject of weak and strong points. For the use of direct or

indirect methods arises out of attack and defence, and the

perception of weak and strong points depends again on the above

methods. Hence the present chapter comes immediately after the

chapter on Energy."]

1. Sun Tzŭ said: Whoever is first in the field and awaits the

coming of the enemy, will be fresh for the fight; whoever is

second in the field and has to hasten to battle, will arrive

exhausted.