Photo G2225: C Company, 720th MP Battalion Armored Commando Car C57 “Happiness Is A Warm Gun” parked on Long Binh Post, Bien Hoa Province, Military Region III, South Vietnam in 1971. Courtesy of SP/4 Charles D. Spruell, C Company, 720th MP Battalion, 89th MP Group, 18th MP Brigade, March 1971 to January 1972 .