MARINE CORPS AIR STATION YUMA, Ariz. -- U.S. Marines stationed at Marine Corps Air Station (MCAS) Yuma, practice Marine Corps Martial Arts Program (MCMAP) techniques at MCAS Yuma, Ariz., June 18, 2019. MCMAP is a combat system developed by the United Stated Marine Corps to combine martial arts techniques with morale and team-building functions and instructions in the warrior ethos that Marines should embody. (U.S. Marine Corps photo by Lance Cpl. John Hall)