In other words, you want to make their every mission a suicide mission.
Funny, if you even bothered to see the effectiveness of our forces---without slaughtering innocent women and children---you'll find that for 200 years they have been extremely effective at knocking off the enemy without committing suicide. Again, I refer you to the Marine honor code, and I don't see anything in that about leveling unarmed civilians. Could be wrong, though.