: "As a general rule, those who are waging
war should get rid of all the domestic troubles before proceeding
to attack the external foe."]

3. After that, comes tactical maneuvering, than which there
is nothing more difficult.

[I have departed slightly from the traditional
interpretation of Ts`ao Kung, who says: "From the time of
receiving the sovereign's instructions until our encampment over
against the enemy, the tactics to be pursued are most difficult."
It seems to me that the tactics or maneuvers can hardly be said
to begin until the army has sallied forth and encamped, and
Ch`ien Hao's note gives color to this view: "For levying,
concentrating, harmonizing and entrenching an army, there are
plenty of old rules which will serve. The real difficulty comes
when we engage in tactical operations." Tu Yu also observes that
"the great difficulty is to be beforehand with the enemy in
seizing favorable position."]

The difficulty of tactical maneuvering consists in turning the
devious into the direct, and misfortune into gain.

[This sentence contains one of those highly condensed and
somewhat enigmatical expressions of which Sun Tzu is so fond.
This is how it is explained by Ts`ao Kung: "Make it appear that
you are a long way off, then cover the distance rapidly and
arrive on the scene before your opponent." Tu Mu says:
"Hoodwink the enemy, so that he may be remiss and leisurely while
you are dashing along with utmost speed." Ho Shih gives a
slightly different turn: "Although you may have difficult ground
to traverse and natural obstacles to encounter this is a drawback
which can be turned into actual advantage by celerity of
movement." Signal examples of this saying are afforded by the
two famous passages across the Alps--that of Hannibal, which laid
Italy at his mercy, and that of Napoleon two thousand years
later, which resulted in the great victory of Marengo.]

4. Thus, to take a long and circuitous route, after
enticing the enemy out of the way, and though starting after him,
to contrive to reach the goal before him, shows knowledge of the
artifice of DEVIATION.

[Tu Mu cites the famous march of Chao She in 270 B.C. to
relieve the town of O-yu, which was closely invested by a Ch`in
army. The King of Chao first consulted Lien P`o on the
advisability of attempting a relief, but the latter thought the
distance too great, and the intervening co