Multiple tents connect to create a Combat Operations Center during a 2nd Marine Division Command Post Exercise at Camp Lejeune, N.C., Oct. 29, 2015. The purpose of the CPX is to test the division’s ability to set up a communications network in any environment that would be used to allow the division commander to command and control his Marines. (U.S. Marine Corps photo by Cpl. Kirstin Merrimarahajara/Released) - Multiple tents connect to create a Combat Operations Center during a 2nd Marine Division Command Post Exercise at Camp Lejeune, N.C., Oct. 29, 2015. The purpose of the CPX is to test the division’s ability to set up a communications network in any environment that would be used to allow the division commander to command and control his Marines. (U.S. Marine Corps photo by Cpl. Kirstin Merrimarahajara/Released)