Then there's Mike Harding's 'Christmas 1914', another song about the 'Christmas Truce', and Eric Bogle has written one titled 'All the Fine Young Men'. Don't know whether there are two songs of that title, or whether this is the song Boab referred to above as 'from Carolyn Hobson's album'.
'Tunes of Glory' / 'Margaret and Me' [When Margaret Was Eleven] by Pete St John is another fine song, as is 'Standing in Line' by Lester Simpson.