U.S. Marines go through the Jungle Warfare Training Center’s endurance course on Camp Gonsalves, Okinawa, Japan, Nov. 25, 2014. The Marines are assigned to the 1st Battalion, 1st Marine Regiment, currently assigned to the 4th Marine Regiment, 3rd Marine Division, III Marine Expeditionary Force. They had to make their way through pits filled with muddy water and many other obstacles. U.S. Marine Corps Photo by Cpl. Thor J. Larson)

The slideshow below has more images of Marines tackling the Jungle Warfare Training Center’s endurance course on Camp Gonsalves.