It looked to me (and a couple other members of the group) as if Drake feels guilty about serving in Vietnam, which is not his fault. There are a lot of horrible things that happen in the stories and we had several people who didn't read or finish a story or two.
Friends told me years ago that I wouldn't like Drake, so I've never read him before, and they were right.
As it happens, I read three war books/series in a row. The one I liked best was Elizabeth Moon's Vatta's War (you can get all my link reviews for that in that post), I liked Gardner Dozois' anthology Galactic Empires next, and the Drake not at all.