Mortarmen with 3rd Battalion, 25th Marine Regiment, go over setting up a M224 60mm Mortar during Exercise Northern Strike at Camp Grayling, Mich., Aug. 7, 2018. Northern Strike’s mission is to exercise participating units’ full-spectrum of capabilities through realistic, cost-effective joint fires training in an adaptable environment, with an emphasis on joint and coalition force cooperation. (U.S. Marine Corps photo by Cpl. Niles Lee)