Attack where he is unprepared; sally forth when he does not expect you.
The supreme art of war is to subdue the enemy without fighting.
Keep your friends close and your enemies even closer.
Peace proposals unaccompanied by a sworn covenant indicate a plot.
Secret operations are essential in war; upon them the army relies to make its every move.
It is the rule in war, if ten times the enemy's strength, surround them; if five times, attack them; if double, be able to divide them; if equal, engage them; if fewer, defend against them; if weaker, be able to avoid them.