Looking for Recommendations

Hey /book/, I'm hoping you can give me some suggested fiction about or set during war. At the risk of sounding pretentious, I'm looking only for things that would be considered literature, as opposed to page-turning thrillers and whatnot.

For example, I just read Farewell to Arms, and that was pretty awesome. More stuff like that, though not necessarily about WW1 (but it could be}.

Thanks book.

The Thin Red Line