Photo G2596: SGT York of the 458th US Army Transportation Company, (PBR) Patrol Boat Riverine, attached to B Company, 720th MP Battalion, relaxing outside his barracks on Long Binh Post in Vietnam in 1970. If you can provide the first name for SGT York, use this Email Link. Courtesy of Edward R. Aldrich B Company, 720th MP Battalions, 89th MP Group, 18th MP Brigade, July 1969-July 1970.