U.S. Marines move through brush during a raid to establish a forward command operations center as part of Marine Expeditionary Force 20.1 on Fort Drum, New York Oct. 31, 2020. Marines with 2nd Marine Logistics Group are participating in MEFEX 21.1, a MEF-level exercise consisting of approximately 1,200 Marines and sailors across the eastern United States. (U.S. Marine Corps photo by Lance Cpl. Scott Jenkins) - U.S. Marines move through brush during a raid to establish a forward command operations center as part of Marine Expeditionary Force 20.1 on Fort Drum, New York Oct. 31, 2020. Marines with 2nd Marine Logistics Group are participating in MEFEX 21.1, a MEF-level exercise consisting of approximately 1,200 Marines and sailors across the eastern United States. (U.S. Marine Corps photo by Lance Cpl. Scott Jenkins)