On a battlefield an army is always moving. Where it passes and where it halts decides the outcome.
The chapter on marching deals with exactly this, chu jun, the way an army takes up its position.
凡處軍相敵：絕山依谷，視生處高，戰隆無登，此處山之軍也
fan chu jun xiang di, jue shan yi gu, shi sheng chu gao, zhan long wu deng, ci chu shan zhi jun ye
The way an army settles and observes the enemy is this. Crossing mountains, keep to the valleys. Look for the living side and settle high. Do not climb to fight an enemy above you. This is how an army settles in mountains. (The Art of War, On the March, translated directly)