A historical song based on ww2 in belguim where a French unit fought rommel so savagely he declared that they were not men, they were green wolves.
https://www.youtube.com/watch?v=iGtEH1i78sI (https://www.youtube.com/watch?v=iGtEH1i78sI)
https://en.m.wikipedia.org/wiki/Chasseurs_Ardennais (https://en.m.wikipedia.org/wiki/Chasseurs_Ardennais)
The song is from an album by sabaton called heroes that has tribute songs to many valiant forces, like the night witches and others.