Heny went to war with a romantic idea of how and what it was. When the time gets close to actually go to battle he questions his ability. I think this rings very true with what happened after 9/11. i knew lots of young kids who joined up immediately thinking they were going to whup some ass, only to be scared to death in the real mcCoy. This happened during WW II as with you grandpa, Brienne, and with my grandpa in WW I. their entire college classes joined up as a lark, with the promise they could all stay together in one unit. Little did either of them know that less than 1/4 of those units would make it back.