D-Day Landings (June 6, 1944). General Dwight D. Eisenhower’s decision to launch the Allied invasion of Normandy was made under immense pressure, with weather and intelligence uncertainties. Despite imperfect information, Eisenhower famously gave the go-ahead with the words “OK, let’s go,” understanding that waiting for perfect conditions could mean missing the opportunity entirely. The bold, timely decision was crucial to the success of the operation and is often cited as a defining example of American decisiveness and willingness to act quickly.