Marines with Bravo Company, 1st Battalion, 24th Marine Regiment, 4th Marine Division, prepare a M49A1 trip flare during their annual training exercise on Camp Grayling, Mich., Aug. 11, 2020. The training and readiness manual gives guidance on the equipment, ammunition, ranges and support requirements to plan and execute effective training to increase Marines’ lethality. (U.S. Marine Corps photo by Lance Cpl. Leslie Alcaraz)