Marine Rapid Infiltration

The , known more simply as MRI, was a special operations subdivision under direct control of the United Nations Space Command Special Warfare Directorate and is administrated by the UNSC Marine Corps, though is technically not a subordinate operation of the latter although the majority of its operators are recruited from the Marine Corps. Formed soon after the Human-Covenant War, MRI would carry out covert activities through the Galactic War [1].