On September 27, 1964, the report of the Warren Commission chaired by Chief Justice Earl Warren on the Kennedy assassination was released. The report essentially concluded that Lee Harvey Oswald had acted alone. Review the Report of the President's Commission on the Assassination of President Kennedy.

On September 27, 1940, Chancellor Adolf Hitler of Germany, Foreign Minister Galeazzo Ciano of Italy and Ambassador Saburo Kurusu of Japan signed the Tripartite Pact, creating the World War II alliance of the Axis Powers. The Pact was later assented to by other members of the Axis, including Hungary, Romania, Croatia, Slovakia, Bulgaria, and the Kingdom of Yugoslavia.