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VOLUME THREE
Use of Spies
Top. Part 95. Part 96. Part 97. Part 98. Part 99. Part 100.
Part 95
Sun Tzu said: When an army with one hundred thousand officers and soldiers is sent to war a thousand li away,
the common people and the state treasury together have
to spend a thousand pieces of gold everyday in support of
it. There will be continuous disturbance at home and
abroad, and a lot of common people involved with convoys
are exhausted from performing transportation services.
About seven hundred thousand households* will be unable to cultivate their fields. If a general engages his state
in a drawn-out war for several years to strive for victory
which is decided merely in a single day, and if the general
begrudges the expenditure of a hundred pieces of gold in
honours and emoluments to employ spies and is thus ignorant of the enemy's situations, he is, of course, completely devoid of humanity. Such a man is not a good general, not a good assistant to his sovereign, and no master of victory.
Therefore, an enlightened sovereign and an able general can defeat the enemy whenever they take action and
achieve extraordinary accomplishments, because they can
foresee the development of war. Such fore-knowledge
cannot be obtained from ghosts and spirits, cannot be had
from analogous experiences, cannot be found by calculating the positions of the sun, the moon and stare. It must
be obtained from the people who clearly know the enemy's situations.
* In ancient China, eight families comprised a community. When one
family sent a man to join the army, the remaining seven families
contributed to its support. So, when an army of one hundred thousand was raised those unable to attend fully to their own ploughing and sowing amounted to seven hundred thousand households.
Part 96
There are five kinds of spies to be used: native spy,
inside spy, converted spy, expendable spy and surviving
spy.
When you use the five kinds of secret agents simultaneously, the enemy cannot know the principle of their operation. It is divinely intricate and becomes the greatest
magic weapon for the sovereign to defeat the enemy.
Native or local spies are those employed from among
the enemy's villagers. Inside spies are those employed
from among the enemy's officials. Converted spies are
those employed from among the enemy spies. Expendable
spies are our own secret agents, who are deliberately give
some false information of ours to report to the enemy.
Frequently they would be caught and put to death.
Surviving spies are those who come and go between the
enemy and us, and return safely with the enemy's information.
Part 97
In regard to trusted followers in the armed forces,
none is more intimate than the spies who are close to the
general or the commander; of all rewards, none is more
generous than those given to spies, and regarding military
secrets, none is more confidential than those relating to
espionage.
He who is not a sage cannot use spies; he who is not
humane and just cannot command spies; he who is not
careful and subtle cannot get truthful information from
spies.
Subtle indeed! Truly subtle! There is no place where
espionage is not possible. If a secret plan is divulged
prematurely, the spy and those who are told about it shall
be put to death.
Part 98
If you plan to strike an enemy's troops, or attack an
enemy's city, or kill an enemy's commander, you must find
out first the name of the chief garrison commander, his
aides-de-camp, trusted followers, ushers, gatekeepers and
bodyguards, and you must instruct your spies to investigate these in detail.
Part 99
You must ascertain those enemy spies who have been
sent to conduct espionage against you. Bribe them, exhort
and release them to serve you. At last they will become
converted spies and work for you.
Through these converted spies, you can obtain information about the enemy and recruit native spies and inside spies. In this way, your expendable spies may convey the false information about your army to the enemy. In the same way, the surviving spies you sent to the enemy may return on schedule and give you information.
A sovereign must know how to use the five types of
spies. Such knowledge is necessarily derived from the
converted spies, so converted spies should be rewarded
generously.
Part 100
In ancient history, the rise of Yin* was due to Yi
Zhi, who was former minister of Xia; and the rise of the
Zhou Dynasty* was due to Jiang Ziya*, the former minister of Shang.
So only the enlightened sovereign and the able general can find out and use the intelligent men as spies and
achieve great tasks. The use of spies is essential in war,
and the army must depend on this in its action.
* Yin, the later period of the Shang Dynasty (16th-11th century B.C.).
* Zhou Dynasty, (llth-2nd century B.C.)
* Jiang Ziya: alias Lü Ya.
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