CAMP PENDLETON, Calif. (Sept. 17, 2020) Secretary of Defense Mark T. Esper interacts with Marines from 3rd Assault Amphibian Battalion, 1st Marine Division during an amphibious combat vehicle static display at Camp Pendleton, California, Sept. 17, 2020. The amphibious combat vehicle will replace the amphibious assault vehicle in all assault amphibian battalions across the Marine Corps, equipping Marines to effectively conduct sea-to-shore operations. (U.S. Marine Corps photo by Staff Sgt. Kyle C. Talbot)