I just played the tune on the anglo concertina in G in Digtrad and it sounds like John Kanaka shanty.

I remember Sean Cannon singing something like it and I heard Bob Cooney my dad Sam's Spanish Civil War comrade sing it
Good marching song in 4/4

I found myself going into Ten Green Bottles and Hanging on the old barbed wire.
Ripe for parodies.

Quite a few of the Brigaders had fought in WW1