Sun Tzu said: We may distinguish six kinds of terrain, to wi... ss. 10.1, Chapter 10: Terrain

These six are the principles connected with Earth. ss. 10.13, Chapter 10: Terrain

Now an army is exposed to six several calamities, not arisin... ss. 10.14, Chapter 10: Terrain

These are six ways of courting defeat, which must be careful... ss. 10.20, Chapter 10: Terrain