UNSC Marine Expeditionary Reconnaissance was a special operations capability developed by the Marine Special Operations Command and the Office of Naval Intelligence. Formulated by Beah Schore and Kawika Son, it was initiated in 2560 and certified as Special Operations Capable in 2570. Known more colloquially as the "Myrmidons", in homage to the preceding SPARTANs, Marine Expeditionary Reconnaissance forces provided deep reconnaissance, direct action, and counterterrorism capabilities to the Marine Corps at the Echelon Above Fleet Marine Force level.