The GF Battle Theme is the theme music that plays during Galactic Federation battles in Metroid Prime 3: Corruption, namely during the attack on Norion and the invasion on the Pirate Homeworld following the deactivation of the Defense System Generator. It also plays during the escape sequence on the Spire Pod, despite the fact that neither Federation Marines nor affiliates are present. It is one of the songs available for purchase in the Soundtrack Gallery. On the UK Corruption website, it is known as Track_6 in the music player.
It can be heard here: .