Marines attempt to locate a notional target during a company attack exercise at Fort A.P. Hill, Va., May 1, 2017. The Marines conducted a live-fire exercise that helped improve their leadership and teamwork abilities. The Marines are with G Company, 2nd Battalion, 2nd Marine Regiment. (U.S. Marine Corps photo by Pfc. Abrey D. Liggins) - Marines attempt to locate a notional target during a company attack exercise at Fort A.P. Hill, Va., May 1, 2017. The Marines conducted a live-fire exercise that helped improve their leadership and teamwork abilities. The Marines are with G Company, 2nd Battalion, 2nd Marine Regiment. (U.S. Marine Corps photo by Pfc. Abrey D. Liggins)

A Marine with Sniper Platoon, Weapons Company, 2nd Battalion, 6th Marine Regiment, adjusts the scope of an M40 bolt-action sniper rifle during a weapons zeroing range at G21, Camp Lejeune, N.C., Sept. 3, 2015. The M40 sniper rifle is capable of hitting a target at 1,000 yards. (U.S. Marine Corps photo by Cpl. Paul S. Martinez) - A Marine with Sniper Platoon, Weapons Company, 2nd Battalion, 6th Marine Regiment, adjusts the scope of an M40 bolt-action sniper rifle during a weapons zeroing range at G21, Camp Lejeune, N.C., Sept. 3, 2015. The M40 sniper rifle is capable of hitting a target at 1,000 yards. (U.S. Marine Corps photo by Cpl. Paul S. Martinez)

Marines with Alpha Company, 2nd Combat Engineer Battalion, practice firing an unloaded Shoulder-launched Multipurpose Assault Weapon during a platoon fire and maneuver range at Fort A.P. Hill, Va., Aug. 13, 2015. The platoons put everything they had learned so far during the deployment for training exercise to the test by using both their provisional infantry and combat engineering skills during the culminating event. (U.S. Marine Corps photo by Cpl. Michelle Reif/Released) - Marines with Alpha Company, 2nd Combat Engineer Battalion, practice firing an unloaded Shoulder-launched Multipurpose Assault Weapon during a platoon fire and maneuver range at Fort A.P. Hill, Va., Aug. 13, 2015. The platoons put everything they had learned so far during the deployment for training exercise to the test by using both their provisional infantry and combat engineering skills during the culminating event. (U.S. Marine Corps photo by Cpl. Michelle Reif/Released)