The Song is called "Green Fields of France" written by Eric Bogle.

I understand it was written after a visit to a Commonwealth War Graveyard on the Somme and took the tune from the Irish song "Arthur McBride" hence the reason (plus the fact it mentions 1916 - the date of the Easter Rising in Ireland) it is often thought of as Irish.

It's on the database as "Green Fields of France"

Eric Bogle also wrote "And the Band Played Waltzing Matilda", another anti-war song about the ANZAC forces in Gallipoli.

Regards

Davebhoy