The song is based on Johnny I Hardly Knew Ye. If you're American, you may recognize the US Civil War adoption called When Johnny Comes Marching Home Again. They are all the same music and the original is the Irish anti-war song, most recently popularized by a punk band out of Boston whose name has escaped me. Ask me again in like five minutes.
[–] derram 0 points 1 point 1 point (+1|-0) ago
[–] TheBuddha ago
Dropkick Muphy's. That's the name of the band that does the punk version.
One of the older popular recordings was done by the Irish Rovers.