On November 2, 1963, South Vietnamese President Ngo Dinh Diem and his brother Ngo Dinh Nhu were captured and shot by army officers in Saigon, a day after a coup had overturned their government. The brothers had held power since 1955 with strong backing from Washington.
The coup grew from the failure of Diem's war against the communist insurgency and from the Buddhist protests that his regime had met with force. The United States, losing faith, signaled that it would not block a change of leadership.
The generals moved. The brothers fled. More leaders would fall. Diem was the first.
The new rulers in Saigon proved no steadier than the old, and the months after the killings brought a string of short-lived juntas that weakened the south just as the Viet Cong and North Vietnam pressed harder, a turn that pulled the United States deeper into a war it would come to regret.
His death removed a stubborn ally but solved none of the problems that had produced the coup, and the war outlived every government it touched. The date marks the moment Washington's man in Saigon fell, and the south never recovered a stable hand.
Washington had urged a change of faces, not a killing, and the murder strained ties between the allies even as the war grew. The coup leaders who ordered it held power only briefly before the cycle of plots closed around them too.