Marines from India Company, 3rd Battalion, 25th Marine Regiment, rush out of a amphibious assault vehicle during a mechanized attack range at Camp Grayling, Mich., Aug. 9, 2018. Camp Grayling, the largest National Guard center in the country covering 147,000 acres, offers many large artillery, mortar, tank ranges and maneuver courses. (U.S. Marine Corps photos by Cpl. Niles Lee)