Sun Tzu's Art of War, Chapter 11, classifies nine types of terrain—dispersive, light, contentious, intersecting, focal, heavy, difficult, encircled, and deadly—detailing appropriate military strategies for each. The text emphasizes adapting tactics to the specific challenges and opportunities presented by the terrain, stressing the importance of understanding the enemy's strengths and weaknesses, as well as the psychological factors affecting troop morale and effectiveness. Successful commanders exploit terrain to achieve surprise, maintain unity, and manipulate the enemy's actions, ultimately securing victory through careful planning and decisive action. The text uses analogies, such as the "Shuai Ran" snake and the cooperative efforts of enemies in shared peril, to illustrate key principles of strategic coordination and decisive action.