Midnight Medical, US Marine Corps Photo

U.S. Navy Corpsmen perform initial battle wound assessments of wounded Marines during a Quick Reaction drill at the 1st Battalion, 5th Marines forward operating base as a part of Exercise Steel Knight 2014 aboard Marine Corps Air Ground Combat Center Twentynine Palms, Calif., Dec. 13, 2013. Steel Knight enables 1st Marine Division to test and refine its command and control capabilities by acting as the headquarters element for a forward-deployed Marine Expeditionary force. .(U.S. Marine Corps photo by Cpl. Justin A. Bopp/Released)