Photo G2721: Port of Saigon operations under 4th Transportation Command, and security of the Vietnamese National Police, Saigon Port Command Provost Marshal, by the 92nd MP Battalion, 300th and 188th MP Companies, in the Capital Military District of Gia Dinh Province in III Corps Tactical Zone, Vietnam in 1967.  Courtesy of 1LT John A. Hannon, 300th, 188th MP Companies and HQ Detachment, 92nd MP Battalion, 89th MP Group, 18th MP Brigade, 1966-1967.