The Battle Hostile_encounter of Saigon was a month-long battle Hostile_encounter between the Vietnamese National Army of the State of Vietnam ( later to become Becoming the Army of the Republic of Vietnam ) and the private army of the Bình Xuyên organised crime syndicate .

At the time , the Bình Xuyên was licensed Preventing_or_letting with controlling Control the national police by Emperor Bảo Đại , and Prime Minister Ngô Đình Diệm issued an ultimatum for them to surrender Surrendering and come Arriving under state control Control .

The battle Hostile_encounter started Process_start on April 27 , 1955 , and the VNA had largely crushed Destroying the Bình Xuyên within a week .

In the end , the Bình Xuyên were decisively defeated Conquering , their army disbanded Removing and their vice operations collapsed Destroying .