Terry Pratchett. Infantry ballad (№ 253863)

Do you know why soldiers are trained, the perks? And why would you have to shout all the little sons of bitches like Strappi? To make you ready in order to stab with a sword of some poor guy who, as it happens, dressed in the enemy uniform. It is the same as you, and you're just like him. He doesn't particularly want to kill you, and you don't really want to kill him. But if you don't put him first, he'll tuck you in. This is the beginning and the end of military science.