Page:Sun Tzu on The art of war.djvu/190

Rh 40. To muster his host and bring it into danger: — this may be termed the business of the general.
 * 1) 

41. The different measures suited to the nine varieties of ground;

the expediency of aggressive or defensive tactics;

and the fundamental laws of human nature: these are things that must most certainly be studied.

42. When invading hostile territory, the general principle is, that penetrating deeply brings cohesion; penetrating but a short way means dispersion.

43. When you leave your own country behind, and take your army across neighbouring territory,

you find yourself on critical ground.