A Marine prepares to load the charge into an M777A2 Howitzer during a live-fire range at Camp Lejeune, N.C., July 26, 2017. The purpose of this field operation is to test and improve the unit’s capabilities by putting the Marines into a simulated combat environment. The Marine is with 1st Battalion, 10th Marine Regiment. (U.S. Marine Corps photo by Lance Cpl. Holly Pernell) - A Marine prepares to load the charge into an M777A2 Howitzer during a live-fire range at Camp Lejeune, N.C., July 26, 2017. The purpose of this field operation is to test and improve the unit’s capabilities by putting the Marines into a simulated combat environment. The Marine is with 1st Battalion, 10th Marine Regiment. (U.S. Marine Corps photo by Lance Cpl. Holly Pernell)