U.S. Marines with 2nd Battalion, 3rd Marine Regiment,

U.S. Marines with 2nd Battalion, 3rd Marine Regiment, go through mud water during the endurance course at the Jungle Warfare Training Center on Okinawa, Japan, March 20, 2020. JWTC prepares Marines for a jungle warfare environment by teaching survival skills, simulating jungle combat scenarios and requiring Marines to implement small unit tactics. (U.S. Marine Corps photo by Lance Cpl. Jackson Dukes)