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Marines Corps 1st Lt. John Merten, the executive officer of Co. C, 3rd Assault Amphibian Battalion, 1st Marine Division, briefs Marines on Jan. 15, 2021, prior to beginning the Amphibious Combat Endurance Test on Marine Corps Base Camp Pendleton, Calif.

Marines Corps 1st Lt. John Merten, the executive officer of Co. C, 3rd Assault Amphibian Battalion, 1st Marine Division, briefs Marines on Jan. 15, 2021, prior to beginning the Amphibious Combat Endurance Test on Marine Corps Base Camp Pendleton, Calif. (Lance Cpl. Roxanna Ortiz/Marine Corps)