Can't remember song name or artist ... or lyrics

In I think 2012 I downloaded a playlist or an album with the 'best' indie/rock songs of the time. I think it was Indie/rock playlist (though I can't find it there now). On it I believe was a song by a group which sang a repititive acapella song, with several male voices. I can't remember any specific lyrics but the theme was about soldiers, about a group of 'men', like a story about a particular march or something. It was up beat and up tempo, a fun song, with a, or several, recurring phrases. If anyone has any idea what I'm talking about, I would love to remember what it was! Thanks!