Because of this image, my original Blood Axe Warboss has a special group of Boyz known as "Rokkas" that play music as the WAAAGH! goes into battle.



They started this because, while traveling through the Warp, the Boyz that would become the Rokkas heard an "ancient humie war song..."



Or, for clarification on what the song is in our era, Iron Maiden's The Trooper. Honestly, I now associate Orks with it; the two just mix perfectly. It's like Sabaton combined with Chaos; it's gonna work because it's a combination of two of the most badass things known to humankind.



And as a little fun fact, yes, the Rokkas sing The Trooper a lot.