quotes VI. ss. 1, where Sun Tzu
warns us against coming exhausted to the attack. His own idea of
the situation is rather vaguely expressed: "If there is a
favorable position lying in front of you, detach a picked body of
troops to occupy it, then if the enemy, relying on their numbers,
come up to make a fight for it, you may fall quickly on their
rear with your main body, and victory will be assured." It was
thus, he adds, that Chao She beat the army of Ch`in. (See p.
57.)]

48. On open ground, I would keep a vigilant eye on my
defenses. On ground of intersecting highways, I would
consolidate my alliances.
49. On serious ground, I would try to ensure a continuous
stream of supplies.

[The commentators take this as referring to forage and
plunder, not, as one might expect, to an unbroken communication
with a home base.]

On difficult ground, I would keep pushing on along the road.
50. On hemmed-in ground, I would block any way of retreat.

[Meng Shih says: "To make it seem that I meant to defend
the position, whereas my real intention is to burst suddenly
through the enemy's lines." Mei Yao-ch`en says: "in order to
make my soldiers fight with desperation." Wang Hsi says,
"fearing lest my men be tempted to run away." Tu Mu points out
that this is the converse of VII. ss. 36, where it is the enemy
who is surrounded. In 532 A.D., Kao Huan, afterwards Emperor and
canonized as Shen-wu, was surrounded by a great army under Erh-
chu Chao and others. His own force was comparatively small,
consisting only of 2000 horse and something under 30,000 foot.
The lines of investment had not been drawn very closely together,
gaps being left at certain points. But Kao Huan, instead of
trying to escape, actually made a shift to block all the
remaining outlets himself by driving into them a number of oxen
and donkeys roped together. As soon as his officers and men saw
that there was nothing for it but to conquer or die, their
spirits rose to an extraordinary pitch of exaltation, and they
charged with such desperate ferocity that the opposing ranks
broke and crumbled under their onslaught.]

On desperate ground, I would proclaim to my soldiers the
hopelessness of saving their lives.

Tu Yu says: "Burn your baggage and impedimenta, throw away
your stores and provisions, choke up the wells, destroy your
cooking-stoves, and make it plain to your men that they cannot
s