The National Field Police Force (Cãnh Sát Dã Chiến, CSDC) was a paramilitary force of the South Vietnam National Police, created on January 27, 1966. Its two main tasks were to destroy the communist infrastructure in rural and urban inhabited areas, as well as suppressing civil unrest. Its numbers consisted of Vietnamese police and armed forces volunteers, including an influx of special forces when the LLDB was dissolved (Lực Lượng Đặc Biệt Quân Lực Việt Nam Cộng Hòa, Special Forces of the Army of the Republic of Vietnam) in December 1970. The Field Police soldiers passed through ARVN schools, such as the Thu Duc Infantry School, as well as courses in Dalat for officers and sergeants. It was also common for Field Police soldiers to be sent to training in neighboring countries, such as Malaysia and the Philippines.
On April 30, 1975, after President Duong Van Minh announced the surrender, and the CSDC commander, Lieutenant Colonel Nguyen Van Long, committed suicide at the foot of the South Vietnamese Marine Corps monument.
Field Police on the streets of Saigon on the morning of the fateful April 30, 1975