On the Art of War by Sun Tzu - HTML preview

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VI. WEAK POINTS AND STRONG

[Chang Yu attempts to explain the sequence of chapters as follows:

"Chapter IV, on Tactical Dispositions, treated of the offensive and the

defensive; chapter V, on Energy, dealt with direct and indirect

methods. The good general acquaints himself first with the theory of

attack and defense, and then turns his attention to direct and indirect

methods. He studies the art of varying and combining these two

methods before proceeding to the subject of weak and strong points.

For the use of direct or indirect methods arises out of attack and

defense, and the perception of weak and strong points depends

again on the above methods. Hence the present chapter comes

immediately after the chapter on Energy."]

1. Sun Tzu said: Whoever is first in the field and awaits the coming of

the enemy, will be fresh for the fight; whoever is second in the field

and has to hasten to battle will arrive exhausted. 2. Therefore the

clever combatant imposes his will on the enemy, but does not allow

the enemy's will to be imposed on him.

[One mark of a great soldier is that he fight on his own terms or fights

not at all. [1] ]

3. By holding out advantages to him, he can cause the enemy to

approach of his own accord; or, by inflicting damage, he can make it

impossible for the enemy to draw near.

[In the first case, he will entice him with a bait; in the second, he will

strike at some important point which the enemy will have to defend.]

4. If the enemy is taking his ease, he can harass him;

[This passage may be cited as evidence against Mei Yao-


 Chèn's interpretation of I. ss. 23.]

if well supplied with food, he can starve him out; if quietly encamped,

he can force him to move. 5. Appear at points which the enemy must

hasten to defend; march swiftly to places where you are not

expected. 6. An army may march great distances without distress, if it

marches through country where the enemy is not.

[Tsào Kung sums up very well: "Emerge from the void [q.d. like "a

bolt from the blue"], strike at vulnerable points, shun places that are

defended, attack in unexpected quarters."]

7. You can be sure of succeeding in your attacks if you only attack

places which are undefended.

[Wang Hsi explains "undefended places" as "weak points; that is to say, where the general is lacking in capacity, or the soldiers in spirit;

where the walls are not strong enough, or the precautions not strict

enough; where relief comes too late, or provisions are too scanty, or

the defenders are variance amongst themselves."]

You can ensure the safety of your defense if you only hold positions

that cannot be attacked.

[I.e., where there are none of the weak points mentioned above.

There is rather a nice point involved in the interpretation of this later

clause. Tu Mu, Chèn Hao, and Mei Yao-chèn assume the meaning

to be: "In order to make your defense quite safe, you must defend

EVEN those places that are not likely to be attacked;" and Tu Mu

adds: "How much more, then, those that will be attacked." Taken

thus, however, the clause balances less well with the preceding—

always a consideration in the highly antithetical style which is natural

to the Chinese. Chang Yu, therefore, seems to come nearer the mark

in saying: "He who is skilled in attack flashes forth from the topmost

heights of heaven [see IV. ss. 7], making it impossible for the enemy

to guard against him. This being so, the places that I shall attack are

precisely those that the enemy cannot defend…. He who is skilled in

defense hides in the most secret recesses of the earth, making it

impossible for the enemy to estimate his whereabouts. This being so,

the places that I shall hold are precisely those that the enemy cannot

attack."]

8. Hence that general is skillful in attack whose opponent does not

know what to defend; and he is skillful in defense whose opponent

does not know what to attack.

[An aphorism which puts the whole art of war in a nutshell.]

9. O divine art of subtlety and secrecy! Through you we
 learn to

be invisible, through you inaudible;

[Literally, "without form or sound," but it is said of
 course with

reference to the enemy.]

and hence we can hold the enemy's fate in our hands. 10. You may

advance and be absolutely irresistible, if you make for the enemy's

weak points; you may retire and be safe from pursuit if your

movements are more rapid than those of the enemy. 11. If we wish to

fight, the enemy can be forced to an engagement even though he be

sheltered behind a high rampart and a deep ditch. All we need do is

attack some other place that he will be obliged to relieve.

[Tu Mu says: "If the enemy is the invading party, we can cut his line

of communications and occupy the roads by which he will have to

return; if we are the invaders, we may direct our attack against the

sovereign himself." It is clear that Sun Tzu, unlike certain generals in

the late Boer war, was no believer in frontal attacks.]

12. If we do not wish to fight, we can prevent the enemy from

engaging us even though the lines of our encampment be merely

traced out on the ground. All we need do is to throw something odd

and unaccountable in his way.

[This extremely concise expression is intelligibly paraphrased by Chia

Lin: "even though we have constructed neither wall nor ditch." Li

Chùan says: "we puzzle him by strange and unusual dispositions;"

and Tu Mu finally clinches the meaning by three illustrative

anecdotes—one of Chu-ko Liang, who when occupying Yang-pìng

and about to be attacked by Ssu-ma I, suddenly struck his colors,

stopped the beating of the drums, and flung open the city gates,

showing only a few men engaged in sweeping and sprinkling the

ground. This unexpected proceeding had the intended effect; for Ssu-

ma I, suspecting an ambush, actually drew off his army and retreated.

What Sun Tzu is advocating here, therefore, is nothing more nor less

than the timely use of "bluff."]

13. By discovering the enemy's dispositions and remaining invisible

ourselves, we can keep our forces concentrated, while the enemy's

must be divided.

[The conclusion is perhaps not very obvious, but Chang Yu (after Mei

Yao-chèn) rightly explains it thus: "If the enemy's dispositions are

visible, we can make for him in one body; whereas, our own

dispositions being kept secret, the enemy will be obliged to divide his

forces in order to guard against attack from every quarter."]

14. We can form a single united body, while the enemy must split up

into fractions. Hence there will be a whole pitted against separate

parts of a whole, which means that we shall be many to the enemy's

few. 15. And if we are able thus to attack an inferior force with a

superior one, our opponents will be in dire straits. 16. The spot where

we intend to fight must not be made known; for then the enemy will

have to prepare against a possible attack at several different points;

[Sheridan once explained the reason of General Grant's victories by

saying that "while his opponents were kept fully employed wondering

what he was going to do, HE was thinking most of what he was going

to do himself."]

and his forces being thus distributed in many directions, the numbers

we shall have to face at any given point will be proportionately few.

17. For should the enemy strengthen his van, he will weaken his rear;

should he strengthen his rear, he will weaken his van; should he

strengthen his left, he will weaken his right; should he strengthen his

right, he will weaken his left. If he sends reinforcements everywhere,

he will everywhere be weak.

[In Frederick the Great's INSTRUCTIONS TO HIS GENERALS we

read: "A defensive war is apt to betray us into too frequent

detachment. Those generals who have had but little experience

attempt to protect every point, while those who are better acquainted

with their profession, having only the capital object in view, guard

against a decisive blow, and acquiesce in small misfortunes to avoid

greater."]

18. Numerical weakness comes from having to prepare against

possible attacks; numerical strength, from compelling our adversary

to make these preparations against us.

[The highest generalship, in Col. Henderson's words, is "to compel

the enemy to disperse his army, and then to concentrate superior

force against each fraction in turn."]

19. Knowing the place and the time of the coming battle, we may

concentrate from the greatest distances in order to fight.

[What Sun Tzu evidently has in mind is that nice calculation of

distances and that masterly employment of strategy which enable a

general to divide his army for the purpose of a long and rapid march,

and afterwards to effect a junction at precisely the right spot and the

right hour in order to confront the enemy in overwhelming strength.

Among many such successful junctions which military history records,

one of the most dramatic and decisive was the appearance of

Blucher just at the critical moment on the field of Waterloo.]

20. But if neither time nor place be known, then the left wing will be

impotent to succor the right, the right equally impotent to succor the

left, the van unable to relieve the rear, or the rear to support the van.

How much more so if the furthest portions of the army are anything

under a hundred LI apart, and even the nearest are separated by

several LI!

[The Chinese of this last sentence is a little lacking in precision, but

the mental picture we are required to draw is probably that of an army

advancing towards a given rendezvous in separate columns, each of

which has orders to be there on a fixed date. If the general allows the

various detachments to proceed at haphazard, without precise

instructions as to the time and place of meeting, the enemy will be

able to annihilate the army in detail. Chang Yu's note may be worth

quoting here: "If we do not know the place where our opponents

mean to concentrate or the day on which they will join battle, our unity

will be forfeited through our preparations for defense, and the

positions we hold will be insecure. Suddenly happening upon a

powerful foe, we shall be brought to battle in a flurried condition, and

no mutual support will be possible between wings, vanguard or rear,

especially if there is any great distance between the foremost and

hindmost divisions of the army."]

21. Though according to my estimate the soldiers of Yueh exceed our

own in number, that shall advantage them nothing in the matter of

victory. I say then that victory can be achieved.

[Alas for these brave words! The long feud between the two states

ended in 473 B.C. with the total defeat of Wu by Kou Chien and its

incorporation in Yueh. This was doubtless long after Sun Tzu's death.

With his present assertion compare IV. ss. 4. Chang Yu is the only

one to point out the seeming discrepancy, which he thus goes on to

explain: "In the chapter on Tactical Dispositions it is said, 'One may

KNOW how to conquer without being able to DO it,' whereas here we

have the statement that 'victory' can be achieved.' The explanation is,

that in the former chapter, where the offensive and defensive are

under discussion, it is said that if the enemy is fully prepared, one

cannot make certain of beating him. But the present passage refers

particularly to the soldiers of Yueh who, according to Sun Tzu's

calculations, will be kept in ignorance of the time and place of the

impending struggle. That is why he says here that victory can be

achieved."]

22. Though the enemy be stronger in numbers, we may prevent him

from fighting. Scheme so as to discover his plans and the likelihood

of their success.

[An alternative reading offered by Chia Lin is: "Know beforehand all

plans conducive to our success and to the enemy's failure."

23. Rouse him, and learn the principle of his activity or inactivity.

[Chang Yu tells us that by noting the joy or anger shown by the

enemy on being thus disturbed, we shall be able to conclude whether

his policy is to lie low or the reverse. He instances the action of Cho-

ku Liang, who sent the scornful present of a woman's head-dress to

Ssu-ma I, in order to goad him out of his Fabian tactics.]

Force him to reveal himself, so as to find out his vulnerable spots. 24.

Carefully compare the opposing army with your own, so that you may

know where strength is superabundant and where it is deficient.

[Cf. IV. ss. 6.]

25. In making tactical dispositions, the highest pitch you can attain is

to conceal them;

[The piquancy of the paradox evaporates in translation. Concealment

is perhaps not so much actual invisibility (see supra ss. 9) as

"showing no sign" of what you mean to do, of the plans that are

formed in your brain.]

conceal your dispositions, and you will be safe from the prying of the

subtlest spies, from the machinations of the wisest brains.

[Tu Mu explains: "Though the enemy may have clever and capable

officers, they will not be able to lay any plans against us."]

26. How victory may be produced for them out of the

enemy's
 own tactics—that is what the multitude cannot

comprehend.
 27. All men can see the tactics whereby I conquer,

but what
 none can see is the strategy out of which victory is evolved.

[I.e., everybody can see superficially how a battle is won; what they

cannot see is the long series of plans and combinations which has

preceded the battle.]

28. Do not repeat the tactics which have gained you one victory, but

let your methods be regulated by the infinite variety of circumstances.

[As Wang Hsi sagely remarks: "There is but one root- principle

underlying victory, but the tactics which lead up to it are infinite in

number." With this compare Col. Henderson: "The rules of strategy

are few and simple. They may be learned in a week. They may be

taught by familiar illustrations or a dozen diagrams. But such

knowledge will no more teach a man to lead an army like Napoleon

than a knowledge of grammar will teach him to write like Gibbon."]

29. Military tactics are like unto water; for water in its
 natural

course runs away from high places and hastens downwards.
 30.

So in war, the way is to avoid what is strong and to
 strike at what is

weak.

[Like water, taking the line of least resistance.]

31. Water shapes its course according to the nature of the ground

over which it flows; the soldier works out his victory in relation to the

foe whom he is facing. 32. Therefore, just as water retains no

constant shape, so in warfare there are no constant conditions. 33.

He who can modify his tactics in relation to his opponent and thereby

succeed in winning, may be called a heaven- born captain. 34. The

five elements (water, fire, wood, metal, earth) are not always equally

predominant;

[That is, as Wang Hsi says: "they predominate alternately."]

the four seasons make way for each other in turn.

[Literally, "have no invariable seat."]

There are short days and long; the moon has its periods of waning

and waxing.

[Cf. V. ss. 6. The purport of the passage is simply to illustrate the

want of fixity in war by the changes constantly taking place in Nature.

The comparison is not very happy, however, because the regularity of

the phenomena which Sun Tzu mentions is by no means paralleled in

war.]

[1] See Col. Henderson's biography of Stonewall Jackson, 1902 ed.,

vol. II, p. 490.

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