ce crosses a river in its
onward march, do not advance to meet it in mid-stream.
It will be best to let half the army get across,
and then deliver your attack.

5. If you are anxious to fight, you should not go
to meet the invader near a river which he has to cross.

6. Moor your craft higher up than the enemy, and facing
the sun. Do not move up-stream to meet the enemy.
So much for river warfare.

7. In crossing salt-marshes, your sole concern
should be to get over them quickly, without any delay.

8. If forced to fight in a salt-marsh, you should
have water and grass near you, and get your back
to a clump of trees. So much for operations in salt-marches.

9. In dry, level country, take up an easily accessible
position with rising ground to your right and on your rear,
so that the danger may be in front, and safety lie behind.
So much for campaigning in flat country.

10. These are the four useful branches of military
knowledge which enabled the Yellow Emperor to vanquish
four several sovereigns.

11. All armies prefer high ground to low and sunny
places to dark.

12. If you are careful of your men, and camp on hard
ground, the army will be free from disease of every kind,
and this will spell victory.

13. When you come to a hill or a bank, occupy the
sunny side, with the slope on your right rear.
Thus you will at once act for the benefit of your soldiers
and utilize the natural advantages of the ground.

14. When, in consequence of heavy rains up-country,
a river which you wish to ford is swollen and flecked
with foam, you must wait until it subsides.

15. Country in which there are precipitous cliffs
with torrents running between, deep natural hollows,
confined places, tangled thickets, quagmires and crevasses,
should be left with all possible speed and not approached.

16. While we keep away from such places, we should
get the enemy to approach them; while we face them,
we should let the enemy have them on his rear.

17. If in the neighborhood of your camp there should
be any hilly country, ponds surrounded by aquatic grass,
hollow basins filled with reeds, or woods with thick
undergrowth, they must be carefully routed out and searched;
for these are places where men in ambush or insidious
spies are likely to be lurking.

18. When the enemy is close at hand