December 13, 1974 – Almost exactly 4 months after Richard Nixon resigns the Presidency, the North Vietnamese Army (NVA) launch an attack on Phuoc Long Province, just south of Saigon. The Paris Peace Accords of 1973 supposedly ended the war in Vietnam with a cease-fire. Both Nixon, and his successor Gerald Ford, had promised to come to the aid of South Vietnam if the North attacked. The NVA wanted to test the depth of that commitment and were rewarded with greater success than they had hoped for when the U.S. did nothing. In less than 5 months Saigon would fall, and the war really would be over.
Ironically, the attack was led by NVA General Tran Van Tra who would go on to become Defense Minister in the newly formed Socialist Republic of Vietnam. In 1982 he published a history of the war criticising the Communist Party’s leadership of the 1968 Tet Offensive. For this he was placed under house arrest where he died in 1996.