CAMP HANSEN, Okinawa (Dec. 18, 2020) A U.S. Marine and a Sailor assigned to Combat Logistics Battalion 31, 31st Marine Expeditionary Unit (MEU), perform casualty evacuation drills before the simulated casualties arrive as part of MEU Exercise at Camp Hansen, Okinawa, Japan, Dec. 18, 2020. Casualty evacuation drills are vital to save Marines’ lives in real life scenarios. The 31st MEU, the Marine Corps’ only continuously forward deployed MEU, provides a flexible and lethal force ready to perform a wide range of military operations as the premier crisis response force in the Indo-Pacific region. (U.S. Marine Corps photo by Lance Cpl. Joseph E. DeMarcus)