3rd Division of the Federation Space Army

The 3rd Division of the Federation Space Army is a division of what would be known in later years as the Galactic Federation Marine Corps. It is mentioned in the introduction of Metroid: Zebes Invasion Order. After the Special Investigations Group conducts research on the Metroid creature from SR388, it breaks free from containment and annihilates the research team. The Galactic Federation goes so far as to send in the entirety of the 3rd Division to eliminate that Metroid.