In Death Ground — David Weber; Steve White

As easy as One-Tzu-Three

"--In difficult ground, press on;
--In encircled ground, devise stratagems;
--In death ground, fight."
--Sun Tzu in The Art of War (circa 400 B.C.)

Five thousand years later, in the time of the Fourth Interstellar War, the advice still makes sense.

The Bugs have a superior drive technology, overwhelming numbers, and a strategy that's mind-numbingly alien. For the humans and their enemies-turned-allies, the catlike Orions, choosing their strategy was as easy as One-Tzu-Three: FIGHT!