Photo G3472: Unofficial patch worn on the right shirt pocket by members of the 595th MP Company (Sentry Dog), 504th MP Battalion, 18th MP Brigade, Thua Thien Province, Military Region I, Vietnam in early 1972. Those members of the 595th that was deactivated in April were absorbed into the Phu Bai Detachment of the 212th MP Company (Sentry Dog), 720th MP Battalion, 18th MP Brigade, in 1972 continued to wear the patch. Courtesy of SP/4 Bernie Melancon 212th Company (Sentry Dog), 18th MP Brigade, U.S. Army Pacific Area Command, 1972.