Why not just use those masks that make ypu breath under water and send 50% off your army up a river without anyone knowing then use the others to distract them while the army you dropped back doors them?
"As they say, 'If you know yourself and the situation, you will not lose any battle.' "
Considering you hired the author of The Art of War, Sun Zu, as a principal in his city, shame on the MC for this misquote.
Jus7aguy