U.S. Marines with 2nd Battalion, 1st Marine Division

U.S. Marines with 2nd Battalion, 1st Marine Division attached to the 13th Marine Expeditionary Unit (MEU), ride in a CH-53E Super Stallion with Marine Medium Tiltrotor Squadron 166 Reinforced, the aviation combat element of the 13th MEU, during the Realistic Urban Training (RUT) Exercise at Fort Hunter Liggett, California, Sept. 2, 2015. RUT is the final ground-based training requirement prior to deployment as the 13th MEU moves toward operating embarked at sea. (U.S. Marine Corps photo by Sgt. Tyler C. Gregory/released)