HIJUDAI, Japan (Feb. 19, 2023) U.S. Navy corpsmen with the 31st Marine Expeditionary Unit, and soldiers with the 1st Amphibious Rapid Deployment Regiment, Japan Ground Self-Defense Force, conduct bi-lateral medical operations during a mass casualty exercise at Hijudai, Japan on Feb. 19, 2023. The training simulated a mass casualty event granting the bi-lateral medical team an opportunity to actively practice medical care in the field with closely simulated pressure and conditions during Iron Fist 23. Iron Fist is an annual bilateral exercise designed to increase interoperability and strengthen the relationships between the U.S. Marine Corps, the U.S. Navy, the JGSDF, and the Japan Maritime Self-Defense Force. (U.S. Marine Corps photo by Lance Cpl. Bridgette Rodriguez)