The D-Day invasion, which occurred on June 6, 1944, is closely associated with General Dwight D. Eisenhower, who was the Supreme Commander of the Allied Expeditionary Force. D-Day marked a crucial turning point in World War II, as Allied forces launched a massive invasion of Nazi-occupied France on the beaches of Normandy. The successful operation was a result of extensive planning and coordination, involving thousands of troops and ships. Eisenhower's leadership and strategic vision were instrumental in ensuring the Allied success on this day, ultimately contributing to the liberation of Europe from Nazi control.