A Marine with Charlie Company, 1st Battalion, 8th Marine Regiment, operates an M240B medium machine gun turret during a field exercise aboard Camp Lejeune, N.C., Aug. 25, 2015. Marines with the unit assaulted a simulated town, set up a defensive position and repelled simulated enemy attacks in preparation for their upcoming deployment with Special Purpose Marine Air Ground Task Force Crisis Response. (U.S. Marine Corps photo by Lance Cpl. Aaron Fiala/Released.) - A Marine with Charlie Company, 1st Battalion, 8th Marine Regiment, operates an M240B medium machine gun turret during a field exercise aboard Camp Lejeune, N.C., Aug. 25, 2015. Marines with the unit assaulted a simulated town, set up a defensive position and repelled simulated enemy attacks in preparation for their upcoming deployment with Special Purpose Marine Air Ground Task Force Crisis Response. (U.S. Marine Corps photo by Lance Cpl. Aaron Fiala/Released.)