If you haven't read Pat Barker's WWI trilogy, do. Worth every second. I need to pick up copies myself, since I borrowed them from David-in-California and don't have my own. I also love L.M. Montgomery's Rilla of Ingleside, and I've got a dozen things on my "to read" list on this topic.
I've talked before about how the very concept of fandom -- that people who liked the same books as me might have other things in common with me, too -- was a revelation when I was a kid. That there were other people who would find the same things important, not just one at a time but in groups. In practical terms, what this means is that while most of the rest of the world doesn't even think to make me cry on Armistice Day, my friendslist is extremely good at posting and linking the stuff that makes me lose it entirely. Like the war poets, and like this.