[Hugh Manatee]

I don't recall the actual o fortuna piece, I can't place the music with that name in me head but, there's this chopin piece I really like called Revolution or something like that, I forget what number it was though, but usually searching chopin+revolution will find. It's pretty agressive anda little broody when played right and I find it good "conquest" music. Chopin in general rocks like that.

EDIT: I found an old compilation album with it on it, I've attached a low quality sample, it's Etude No.12 for piano in C minor, AKA 'Revolutionary' - 'Fall of Warsaw'