CAMP HANSEN, Okinawa (Dec. 18, 2020) Hospital Corpsman 2nd Class Sean P. Johnston, from Dallas, Texas, assigned to Combat Logistics Battalion 31, 31st Marine Expeditionary Unit (MEU), evacuates a casualty from a simulated combat zone as part of MEU Exercise on Camp Hansen, Okinawa, Japan, Dec. 18, 2020. Casualty evacuation exercises 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)