Six Kinds of Terrain

Ground may be classified as accessible, entangling, temporizing, narrow passes, precipitous heights, and positions at a great distance from the enemy.

Every situation has its own terrain. Some ground is open and accessible — easy to move on but also easy for others to see you. Some is entangling — easy to enter but hard to leave. Some is narrow — only one can pass at a time. Before you make any move, understand the ground. The best strategy on the wrong terrain is a losing strategy.

Chapter 10 of The Art of War is a detailed taxonomy of terrain types and their strategic implications. The six categories are: accessible (tong) — ground both sides can traverse freely; entangling (gua) — easy to enter but hard to exit; temporizing (zhi) — disadvantageous for both sides to attack; narrow passes (ai) — must be occupied first; precipitous heights (xian) — occupy the high ground; distant (yuan) — too far for effective engagement. Each terrain type demands a different strategy. The six terrains in Chapter 10 classify movement and exposure: some ground is open, some difficult to leave, some narrow, steep, or distant. The categories are military geography, not personality types. They help a commander ask how the environment changes the meaning of a move. A modern reader can borrow the habit of mapping constraints before choosing a tactic, while avoiding the illusion that a complex social situation can be reduced to one label. Revisit the map when conditions change and include the perspective of people who experience the terrain differently. Keep the distinction visible: Six Kinds of Terrain is an interpretive lens, not a prediction or command. The taxonomy also reminds us that movement is relational: ground is accessible or entangling depending on who is moving and who controls it. A map drawn from one viewpoint can conceal another person's exposure. Recheck the terrain from the margins before treating your own route as the whole situation.