Photo G2682: Sam the mascot of B Company, 720th MP Battalion, 89th MP Group, 18th MP Brigade, Vinh Long, IV Corps Tactical Zone, Vietnam in 1971. If you can this dog use this Email Link. Courtesy of SP/4 Marion Carl "Pete" Foster, B Company, 720th MP Battalion, 89th MP Group, 18th MP Brigade, August 1971-April 1972.