On shooting armed men in the back:
When we entered Iraq again in March 2004 it was clearly said, "bad men must die, you won't shoot into crowds of women and children, you will have to run them down and shoot them in the back"... this was said by one of the greatest USMC Generals I have had the pleasure to have faught under, a true man's man.
There ain't no difference in war, between shooting a man in the chest or shooting him in the back, there ain't no difference weather you run them over with a Hummer or call for air support to drop a 500lb bomb on them... bad men or a better term "the men that oppose you", must die, or they will kill you. So weather you shoot them in the face, the chest, the side or the back, it is all the same in the end; bad men must die.
So when the man that was shooting at you with his PKM runs out of ammo and runs away, you shoot him in the back... or he'll got rearm and bring back friends to help him kill you.
On the book
It's a 'decent' book, most of it is a crock of brown warm stuff, that should just be flushed. As a Warrior and As a man who trains men for war... Killing is easy, flash sight picture and press the trigger, follow through and assess. Can't seem to reach them with a rifle, get a belt feed weapon, if that doesn't work call for fire. Keep the mind set, "it's either him or me", which will become "it was either them or me" or "it's either thier men or mine".
The mind set will quickly be engrained, once an IED blows up or a bullet travels by you... the will to live and the training evolve into killing.
Compareing this book to life in America... I hope America never comes to that point, but this book was written for the leaders of men and for men who wish to become warriors, it wasn't ment to help deal with punk kids... it is about "killing".