The Binh Xuyen river pirates first emerged in the early 1920s in the marshes and canals along the southern fringes of Saigon-Cholon. They were a loosely organized coalition of pirate gangs, about two hundred to three hundred strong and early history of the Binh Xuyen was an interminable cycle of kidnapping, piracy, pursuit, and occasionally imprisonment. In September 24, 1945, it organized the massacre of 150 French and Eurasian civilians, including children, in the suburb of Saigon.
While this decision would have been of little consequence in Tonkin or central Vietnam, where the Communist-dominated Viet Minh was strong enough to stand alone, in Cochin China the Binh Xuyen support was crucial. After launching an abortive revolt in 1940, the Cochin division of the Indochina Communist party had been weakened by mass arrests and executions