CAMP PENDLETON, Calif. (Sept. 17, 2020) Secretary of Defense Mark T. Esper speaks with U.S. Marine Corps Staff Sgt. Matthew Champlain, lead instructor and curriculum developer with New Equipment Training Team while viewing the amphibious combat vehicle static display with 3rd Assault Amphibian Battalion, 1st Marine Division at Camp Pendleton, California, Sept. 17, 2020. The amphibious combat vehicle will replace the amphibious assault vehicle in 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)