Hi Beth,Another endorsement for "Johnny Comes Marching Home" for a trad song.
For the WWII era try "Lili Marlene" you'll find it here on DT
Not long post war was, "Where have all the flowers gone" springs to mind - DT link is here
Eric Bogle's, "The Band Played Waltzing Matilda" is indeed a fine modern song - just in case it isn't listed above, the DT link is here
Also the "Last Post" is a must for the finale, it can be done on guitar using "harmonics".
Ummm.....
Since you signed in as GUEST,Beth - the "blue clicky things" will lead you to tunes and lyics...;)
Y'know lass, I reckon we have a problem finding you any appopriate "military" songs. All the "dirges" we are suggesting have a strong anti-war flavour - even the "Last Post" bugle call - and I heard that often enough in the military!
Anyway....
Hope we are helping - let's know how the project goes.
Sampson, CW - Sgt(Rtd) - RNZRI 678894
AKA - Sam