U.S. Marine Cpl. Ethan Gantt, a mortarman with Weapons Company, 3rd Battalion, 25th Marine Regiment, 4th Marine Division, sights in to estimate the range of a target during an indirect fire exercise at Integrated Training Exercise 4-19 at Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., June 6, 2019. ITX 4-19 is a live-fire and maneuver combined arms exercise designed to train battalion and squadron-sized units in tactics, techniques and procedures required to provide a sustainable and ready operational reserve for employment across the full spectrum of crisis and global engagement. (U.S. Marine Corps photo by Lance Cpl. Preston L. Morris)

Marines with Weapons Company, 3rd Battalion, 25th Marine Regiment, fire FGM-148 Javelin missiles during Exercise Northern Strike at Camp Grayling, Mich., Aug. 14, 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 video by Cpl. Niles Lee)