Photo G1713: Enemy POWs under guard at the the Ho Nai, Bien Hoa, Vietnam POW Facility in December 1966. The MP guards are a transport team of B Company, 720th MP Battalion, 89th MP Group, 18th MP Brigade. If you can identify these MPs use this Email Link. Courtesy of SP/4 Alan M. Portnoy, B Company & 615th MP Company, 720th MP Battalion, 89th MP Group, 18th MP Brigade, October 1966 to October 1967.