Marines fire an M1A1 Abrams tank during a gunnery range at Camp Lejeune, N.C., Sept. 19, 2017. The semi-annual range consists of multiple firing tables and a final qualification. The Marines are with 2nd Tank Battalion, 2nd Marine Division. (U.S. Marine Corps photo by Lance Cpl. Holly Pernell) - Marines fire an M1A1 Abrams tank during a gunnery range at Camp Lejeune, N.C., Sept. 19, 2017. The semi-annual range consists of multiple firing tables and a final qualification. The Marines are with 2nd Tank Battalion, 2nd Marine Division. (U.S. Marine Corps photo by Lance Cpl. Holly Pernell)

Marines make their way to a CH-53E Super Stallion helicopter during aerial insert drills at Camp Lejeune, N.C., Sep. 13, 2017. The exercise is part of a Marine Corps Combat Readiness Evaluation to test the unit’s capabilities in a combat environment. The Marines are with 1st Battalion, 6th Marine Regiment. (U.S. Marine Corps photo by Lance Cpl. Holly Pernell) - Marines make their way to a CH-53E Super Stallion helicopter during aerial insert drills at Camp Lejeune, N.C., Sep. 13, 2017. The exercise is part of a Marine Corps Combat Readiness Evaluation to test the unit’s capabilities in a combat environment. The Marines are with 1st Battalion, 6th Marine Regiment. (U.S. Marine Corps photo by Lance Cpl. Holly Pernell)

A Marine prepares to fire simunition rounds at an opposing force during defensive operations training at Camp Lejeune, N.C., Aug. 31, 2017. The exercise is used by the battalion to improve proficiency with combat tactics and in preparation for future operations. The Marine is with Echo Company, 2nd Battalion, 8th Marine Regiment. (U.S. Marine Corps photo by Lance Cpl. Holly Pernell) - A Marine prepares to fire simunition rounds at an opposing force during defensive operations training at Camp Lejeune, N.C., Aug. 31, 2017. The exercise is used by the battalion to improve proficiency with combat tactics and in preparation for future operations. The Marine is with Echo Company, 2nd Battalion, 8th Marine Regiment. (U.S. Marine Corps photo by Lance Cpl. Holly Pernell)