Photo G3303: Members of the 212th MP Company (Sentry Dog), Long Binh Detachment, 720th MP Battalion, 89th MP Group, 18th MP Brigade, in their barracks on Long Binh Post, Bien Hoa Province, Military Region III, Vietnam in 1971.Left to right: SP/4 David H. Niemann, Willie Donohue, Unidentified. If you can provide an identification use this Email Link. Courtesy of SP/4 David H. Niemann, 212th MP Company (Sentry Dog), 720th MP Battalion, 89th MP Group, 18th MP Brigade, 1971-1972.