HIJUDAI, Japan (Feb. 18, 2023) U.S. Navy corpsmen with the 31st Marine Expeditionary Unit and a soldier with the 1st Amphibious Rapid Deployment Regiment, Japan Ground Self-Defense Force, apply a chest seal on a simulated casualty during a mass casualty exercise in Hijudai, Japan, Feb. 18, 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 Japan Ground Self Defense Force, and the Japan Maritime Self-Defense Force. (U.S. Marine Corps photo by Lance Cpl. Bridgette Rodriguez)