A Marine with 5th Battalion, 11th Marine Regiment, 1st Marine Division, establishes communications with the combat operation center in a Combat Convoy Simulator aboard Marine Corps Base Camp Pendleton, Feb. 2, 2016. The CCS at first glance looks like an expensive, high-tech video game, but its primary use is preparing Marines for real-world combat missions with simulations of realistic scenarios. - A Marine with 5th Battalion, 11th Marine Regiment, 1st Marine Division, establishes communications with the combat operation center in a Combat Convoy Simulator aboard Marine Corps Base Camp Pendleton, Feb. 2, 2016. The CCS at first glance looks like an expensive, high-tech video game, but its primary use is preparing Marines for real-world combat missions with simulations of realistic scenarios.