U.S. Marines with 3rd Battalion, 1st Marine Regiment, conduct close-quarters drills during a raid-leaders course aboard Camp Pendleton, Calif., Oct. 8, 2014. Marines with 3/1 are the Battalion Landing Team with the 15th Marine Expeditionary Unit. (U.S. Marine photo by Cpl. Steve H. Lopez/Released) - U.S. Marines with 3rd Battalion, 1st Marine Regiment, conduct close-quarters drills during a raid-leaders course aboard Camp Pendleton, Calif., Oct. 8, 2014. Marines with 3/1 are the Battalion Landing Team with the 15th Marine Expeditionary Unit. (U.S. Marine photo by Cpl. Steve H. Lopez/Released)