9th Marine Expeditionary Force

The 9th Marine Expeditionary Force was a UNSC Marine Corps Expeditionary Force consisting of veteran Marines that was one of many units serving in the Eridanus System in anti-terrorism operations. This unit was a critical part of the UNSC's fight in the Insurrection.

Elements

 * 21st Marine Division
 * 1st Battalion

List of appearances

 * Halo: Contact Harvest