The Galactic Federation Marine Corps comprises the ground-based troopers in the Galactic Federation military of the Metroid
universe. Standard Galactic Federation soldiers were first seen in Metroid Prime 2: Echoes
, though these soldiers were all dead by the time that Samus found them. Metroid Prime 3
introduces the P.E.D. and Demolition squads. The P.E.D. soldiers use Phazon
that is injected into their suits and causes temporary increases in their abilities. The Demolition squad are as the name suggest, for demolition purposes.