U.S. Marines with Sierra Battery, 3rd Battalion, 12th

U.S. Marines with Sierra Battery, 3rd Battalion, 12th Marine Regiment, 3rd Marine Division, perform M67 fragmentation hand grenade training during the Fuji High Mobility Artillery Rocket System Exercise at the Combat Arms Training Center on Camp Fuji, Japan, on Jan. 24, 2019. Training at CATC Fuji offers S Battery the ability to develop their warfighting proficiency by employing their firing capabilities in a cold weather environment. (U.S. Marine Corps photo by Cpl. Josue Marquez)