From Halopedia, the Halo wiki
In 2513, it was commanded by Lieutenant Colonel Ponder, and had an operation at Elysium City, Eridanus II. M-EDF 9/21/1 was ordered by FLEETCOM to neutralize the second-in-command to the Insurrectionist leader, Colonel Robert Watts. Against FLEETCOM's insistence on a show of force, Ponder attempted to personally speak to family members of the second-in-command, when a M-EDF 9/21/1 sharpshooter took a hasty shot, completely collapsing the situation. As a result, Ponder was demoted to the rank of Captain and reassigned from M-EDF 9/21/1.
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