If you're being attacked from the east, attack whoever's to your west, and you were the west. I never read the book. It's full of crap like that.
Αν σου επιτίθονται από τα ανατολικά, εσύ πρέπει να επιτεθείς σε αυτόν στα δυτικά, και εσύ ήσουν στα δυτικά.