8. It is the rule in war, if our forces are ten
    to the enemy's one, to surround him; if five to one,
    to attack him; if twice as numerous, to divide our
army
    into two.
9. If equally matched, we can offer battle;
    if slightly inferior in numbers, we can avoid the
enemy;
    if quite unequal in every way, we can flee from him.
10. Hence, though an obstinate fight may be made
    by a small force, in the end it must be captured
    by the larger force.
11. Now the general is the bulwark of the State;
    if the bulwark is complete at all points; the State
will
    be strong; if the bulwark is defective, the State
will
    be weak.
12. There are three ways in which a ruler can bring
    misfortune upon his army:--
13. (1) By commanding the army to advance or to retreat,
    being ignorant of the fact that it cannot obey.
    This is called hobbling the army.
14. (2) By attempting to govern an army in the
    same way as he administers a kingdom, being ignorant
    of the conditions which obtain in an army.  This
causes
    restlessness in the soldier's minds.
15. (3) By employing the officers of his army
    without discrimination, through ignorance of the
    military principle of adaptation to circumstances.
    This shakes the confidence of the soldiers.
16. But when the army is restless and distrustful,
    trouble is sure to come from the other feudal princes.
    This is simply bringing anarchy into the army, and
flinging
    victory away.
17. Thus we may know that there are five essentials
    for victory:
    (1) He will win who knows when to fight and when
        not to fight.
    (2) He will win who knows how to handle both superior
        and inferior forces.
    (3) He will win whose army is animated by the same
        spirit throughout all its ranks.
    (4) He will win who, prepared himself, waits to take
        the enemy unprepared.
    (5) He will win who has military capacity and is
        not interfered with by the
sovereign.
18. Hence the saying:  If you know the enemy
    and know yourself, you need not fear the result of a
    hundred battles.  If you know yourself but not
the enemy,
    for every victory gained you will also suffer a defeat.
    If you know neither the enemy nor yourself, you will
    succumb in every battle.
IV. TACTICAL DISPOSITIONS
1. Sun Tzu said:  The good fighters of old first put
    themselves beyond the possibility of defeat, and then
    waited for an opportunity of defeating the enemy.
2. To secure ourselves against defeat lies in our
    own hands, but the opportunity of defeating the enemy
    is provided by the enemy himself.
3. Thus the good fighter is able to secure himself against defeat,
    but cannot make certain of defeating the enemy.
4. Hence the saying:  One may know how to conquer
    without being able to do it.
5. Security against defeat implies defensive tactics;
    ability to defeat the enemy means taking the
offensive.
6. Standing on the defensive indicates insufficient
    strength; attacking, a superabundance of strength.
7. The general who is skilled in defense hides in the
    most secret recesses of the earth; he who is skilled
in
    attack flashes forth from the topmost heights of heaven.
    Thus on the one hand we have ability to protect
ourselves;
    on the other, a victory that is complete.
8. To see victory only when it is within the ken
    of the common herd is not the acme of excellence.
9. Neither is it the acme of excellence if you fight
    and conquer and the whole Empire says, "Well done!"
10. To lift an autumn hair is no sign of great strength;
    to see the sun and moon is no sign of sharp sight;
    to hear the noise of thunder is no sign of a quick
ear.
11. What the ancients called a clever fighter is
    one who not only wins, but excels in winning with
ease.
12. Hence his victories bring him neither reputation
    for wisdom nor credit for courage.
13. He wins his battles by making no mistakes.
    Making no mistakes is what establishes the certainty
    of victory, for it means conquering an enemy that is
    already defeated.
14. Hence the skillful fighter puts himself into
    a position which makes defeat impossible, and does
    not miss the moment for defeating the enemy.
15. Thus it is that in war the victorious strategist
    only seeks battle after the victory has been won,
    whereas he who is destined to defeat first fights
    and afterwards looks for victory.
16. The consummate leader cultivates the moral law,
    and strictly adheres to method and discipline; thus it
is
    in his power to control success.
17. In respect of military method, we have,
    firstly, Measurement; secondly, Estimation of
quantity;
    thirdly, Calculation; fourthly, Balancing of chances;
    fifthly, Victory.
18. Measurement owes its existence to Earth;
    Estimation of quantity to Measurement; Calculation to
    Estimation of quantity; Balancing of chances to
Calculation;
    and Victory to Balancing of chances.