U.S. Marines with 9th Communication Battalion, I Marine Expeditionary Force Headquarters Group move into position to assault a combat town with Special Effect Small Arms Marking System during Operation Vigilant aboard Camp Pendleton, Calif., Mar. 9, 2014. Operation Vigilant was conducted to sustain and build proficiency in mounted and dismounted patrolling techniques, Counter Improvised Explosive Device training, and Military Operations in Urban Terrain. (U.S. Marine Corps photo by Cpl Ismael E. Ortega, 1st Marine Division / Released)