September 1964 South Vietnamese coup attempt Date September 13–14, 1964 Location Saigon, South Vietnam Result Coup failed without bloodshed; Nguyễn Cao Kỳ and Nguyễn Chánh Thi gained more leverage over junta leader Nguyễn Khánh Belligerents Army of the Republic of Vietnam (ARVN) rebels South Vietnam Army of the Republic of Vietnam (ARVN) ruling junta Commanders and leaders Trần Thiện Khiêm Lâm Văn Phát Dương Văn Đức Nguyễn Khánh Nguyễn Cao Kỳ Nguyễn Chánh Thi Strength Ten battalions Unclear Casualties and losses None