Photo G3211: Members of the 212th MP Company (Sentry Dog), 720th MP Battalion, 89th MP Group, 18th MP Brigade, training their K9’s for aggressiveness at their compound on Long Binh Post, III Corps Tactical Zone, Bien Hoa Provence, Vietnam in 1969-1970. If you can further identify these MPs, use this Email Link. Courtesy of SGT Lloyd Kahan, Scout Dog Unit, 212th MP Company (Sentry Dog), 720th MP Battalion, 89th MP Group, 18th MP Brigade, 1969-1970.