Just read a cracking Militray book called Amongst The Marines By Steven Preece. I found it to be Violent, Hilariously funnt, disgusting and at the
same time quite sad. It really is an insight into what goes on behind closed doors in the elite military regiments.
I spent eight years (active uty) in the U.S. Army. The last three attached to USASOCOM. Four more years as a civilian with the Dept. of Defense.
A certain amount of "gallows humor" and what by regular society's standards would be considered, callousness, is necessary to do the job without
the job doing you.