Pfc. Gage Haga, transmissions system operator, 1st Battalion, 4th Marine Regiment, stationed out of Marine Corps Base Camp Pendleton, Calif., watches while Cpl. Ryan Griffing, rifleman, 1/4, calls in a 9-line during Command Post Exercise 2 at the Battle Simulation Center aboard the Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., March 29, 2018. CPX-2 is a is a two-part training event that focuses on training battalion staff and is a part of TALONEX 2-18, a pre-deployment training event that coincides with Weapons and Tactics Instructors Course. (U.S. Marine Corps photo by Lance Cpl. Isaac Cantrell) - Pfc. Gage Haga, transmissions system operator, 1st Battalion, 4th Marine Regiment, stationed out of Marine Corps Base Camp Pendleton, Calif., watches while Cpl. Ryan Griffing, rifleman, 1/4, calls in a 9-line during Command Post Exercise 2 at the Battle Simulation Center aboard the Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., March 29, 2018. CPX-2 is a is a two-part training event that focuses on training battalion staff and is a part of TALONEX 2-18, a pre-deployment training event that coincides with Weapons and Tactics Instructors Course. (U.S. Marine Corps photo by Lance Cpl. Isaac Cantrell)