OJOJIHARA PROVING GROUNDS, Japan (Dec. 14, 2021) Soldiers from the Japan Self-Defense Force load a simulated casualty into an ambulance 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)