3.7

Chapter: Attack by Stratagem 3.7
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Translation:

With his forces intact he will dispute the mastery of the Empire, and thus, without losing a man, his triumph will be complete. This is the method of attacking by stratagem.

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Commentary

Fighting wars depletes forces which limits the number of wars a commander can wage. If, however, soldiers are not lost and few munitions are used, then the army may march and march to war, defeating all in its path with little incremental cost.