terrified
assemblage without having so much as changed color. As was to be
expected, the Duke wanted afterwards to repudiate the bargain,
but his wise old counselor Kuan Chung pointed out to him the
impolicy of breaking his word, and the upshot was that this bold
stroke regained for Lu the whole of what she had lost in three
pitched battles.]

29. The skillful tactician may be likened to the SHUAI-JAN.
Now the SHUAI-JAN is a snake that is found in the Ch`ang
mountains.

["Shuai-jan" means "suddenly" or "rapidly," and the snake in
question was doubtless so called owing to the rapidity of its
movements. Through this passage, the term in the Chinese has now
come to be used in the sense of "military maneuvers."]

Strike at its head, and you will be attacked by its tail; strike
at its tail, and you will be attacked by its head; strike at its
middle, and you will be attacked by head and tail both.
30. Asked if an army can be made to imitate the SHUAI-JAN,

[That is, as Mei Yao-ch`en says, "Is it possible to make the
front and rear of an army each swiftly responsive to attack on
the other, just as though they were part of a single living
body?"]

I should answer, Yes. For the men of Wu and the men of Yueh are
enemies;

[Cf. VI. ss. 21.]

yet if they are crossing a river in the same boat and are caught
by a storm, they will come to each other's assistance just as the
left hand helps the right.

[The meaning is: If two enemies will help each other in a
time of common peril, how much more should two parts of the same
army, bound together as they are by every tie of interest and
fellow-feeling. Yet it is notorious that many a campaign has
been ruined through lack of cooperation, especially in the case
of allied armies.]

31. Hence it is not enough to put one's trust in the
tethering of horses, and the burying of chariot wheels in the
ground

[These quaint devices to prevent one's army from running
away recall the Athenian hero Sophanes, who carried the anchor
with him at the battle of Plataea, by means of which he fastened
himself firmly to one spot. [See Herodotus, IX. 74.] It is not
enough, says Sun Tzu, to render flight impossible by such
mechanical means. You will not succeed unless your men have
tenacity and unity of purpose, and, above all, a spirit of
sympathetic cooperation. This is the lesson which can be learned
from the SHUAI-JAN.]

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