> the most damaging part of direct combat is watching people that you consider to be family die or be maimed.

I've heard from various places over the years (documentaries, friends) that soldiers really fight for their comrades at the end of the day. As in when asked "why are you here fighting" if they are in front of a news crews or something where they have to say "we're bringing democracy to ..." they'll just say something like "those fuckers blew my buddy up and I am here to pay them back".