I'm marking as memoir, even though it's fiction, because it feels like it has more truth than most books under that label. (Does that make sense?)
I didn't always keep all of the characters straight--is it Betty or Babs who's attached to that soldier? After I finished the book, the critique I read made me believe the book's power is in the individual experiences melding into a portrayal of the masses.
Spoiler(ish). It's WWI. If he's a guy, he dies. Probably.