OJOJIHARA PROVING GROUNDS, Japan (Dec. 14, 2021) Hospital Corpsman 1st Class Brian Schumacher, with 4th Marines, provides medical care to a simulated casualty during a mass casualty drill as part of Resolute Dragon 21 at Ojojihara Proving Grounds, Japan, Dec. 14, 2021. RD21 is the largest bilateral field training exercise between the U.S. Marine Corps and Japan Ground Self-Defense Force (JGSDF) since 2013 and is the largest ever in Japan. RD21 is designed to strengthen the defensive capabilities of the U.S.-Japan Alliance by exercising integrated command and control, targeting, combined arms, and maneuver across multiple domains. (U.S. Marine Corps photo by Sgt. Kirstin Spanu)