Navy Corpsmen undertaking a Tactical Combat Casualty Care course provided by Marine Forces Reserve secure Chief Petty Officer Michael Young, playing the role of a casualty, on a stretcher simulating the tactical evacuation care section of TCCC at Marine Corps Support Facility New Orleans, Nov. 20, 2019. TCCC has been the most effective way to reduce casualties from injuries on the battlefield since 1996 due to its ability to address immediate threats to life and decrease the amount of time before surgical intervention can occur. (U.S. Marine Corps photo by Lance Cpl. Christopher W. England)