Photo G3106: Handlers prepare for duty at the 212th MP Company (Sentry Dog) Vung Tau Detachment, 95th MP Battalion, 89th MP Group, 18th MP Brigade, Phuoc Tuy Provence, III Corps Tactical Zone, Vietnam summer of 1967. Left to right: 1- SP/4 Jim Miller, 2-PFC Doyle Chandler, 3- Unidentified, 4- PFC Gregg Long. If you can identify #3, use this Email Link. Courtesy of SP/4 Richard L. Sherrie, 212th MP Company (Sentry Dog), 95th & 720th MP Battalions, 89th MP Group, 18th MP Brigade, Vietnam, May 1967-March 1968.