Organizations

Unified Earth Government or United Nations

• Colonial Administration Authority
  • Central Command (CENTCOM)
    • United Nations Space Command Defense Force
      • High Command (HIGHCOM)
        • UNSC Security Committee
        • UNSC Security Council
          • Administrative
            • Personnel Command (PERSCOM)
            • Navigation Command (NAVCOM)
            • UNSC Astrophysics
            • UNSC Medical Corps (MEDCORPS)
            • UNSC Engineering Corps (ENGCORP)
            • UNSC Logistical Corps
            • UNSC Test and Evaluation Corps
            • UNSC Ordnance Committee
          • Uniformed Services
            • UNSC Navy
              • Fleet Command (FLEETCOM)
                • Office of Naval Intelligence (ONI)
                  • Office of Investigations (OI)
                  • Prowler Corps
                  • Naval Special Warfare (NAVSPECWAR)
                    • Project ORION
                      • Project SPARTAN-I
                    • Project SPARTAN-II
                    • Beta-5 Division
                      • Project SPARTAN-III
                • Signal Corps
            • UNSC Marine Corps
              • UNSC Marine Infantry
              • UNSC Marine Aviation
              • UNSC Marine Logistics
              • UNSC Marine Military Police
              • UNSC Marine Special Operations
                • Orbital Drop Shock Troopers
            • UNSC Army
              • UNSC Army Infantry
              • UNSC Colonial Militia
            • UNSC Air Force
      • Other
        • UNSC Symphony Orchestra
      • Commerce
        • Department of Commercial Shipping