Cpl. Aaron Perry, due and status file clerk, Exercise Support Division, Headquarters Battalion, enjoys practicing different forms of martial arts; he finds it to be a mental and physical chess game against his opponent. (U.S. Marine Corps photo by Lance Cpl. Isaac Cantrell) - Cpl. Aaron Perry, due and status file clerk, Exercise Support Division, Headquarters Battalion, enjoys practicing different forms of martial arts; he finds it to be a mental and physical chess game against his opponent. (U.S. Marine Corps photo by Lance Cpl. Isaac Cantrell)