The Art of War, page 108 by Sun Tzu
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109
open to attack, and also know that our men are in a condition to attack, but are unaware that the nature of the ground makes fighting impracticable, we have still gone only halfway towards victory.
30. Hence the experienced soldier, once in motion, is never bewildered; once he has broken camp, he is never at a loss.
[The reason being, according to Tu Mu, that he has taken his measures so thoroughly as to ensure victory beforehand. "He does not move recklessly," says Chang Yu, "so that when he does move, he makes no mistakes."]
31. Hence the saying: If you know the enemy and know yourself, your victory will not stand in doubt; if you know Heaven and know Earth, you may make your victory complete.
[Li Ch`uan sums up as follows: "Given a knowledge of three things--the affairs of men, the seasons of heaven and the natural advantages of earth--, victory will invariably crown your battles."]
[1] See "Pensees de Napoleon 1er," no. 47.
[2] "The Science of War," chap. 2.
[3] "Aids to Scouting," p. xii.
XI. THE NINE SITUATIONS
1. Sun Tzu said: The art of war recognizes nine varieties of ground: (1) Dispersive ground; (2) facile ground; (3) contentious ground; (4) open ground; (5) ground of intersecting highways; (6) serious ground; (7) difficult ground; (8) hemmed-in ground; (9) desperate ground.
2. When a chieftain is fighting in his own territory, it is dispersive ground.
[So called because the soldiers, being near to their homes and anxious to see their wives and children, are likely to seize the opportunity afforded by a battle and scatter in every direction. "In their advance," observes Tu Mu, "they will lack the valor of desperation, and when they retreat, they will find harbors of refuge."]
3. When he has penetrated into hostile territory, but to no great distance, it is facile ground.
[Li Ch`uan and Ho Shih say "because of the facility for retreating," and the other commentators give similar explanations. Tu Mu rem