The D-Day invasion, or Operation Overlord, took place on June 6, 1944, as Allied forces landed on Normandy beaches. This operation aimed to establish a western front against Nazi Germany and was one of the largest amphibious military assaults in history.

The successful D-Day landings were crucial in weakening Nazi control over Western Europe, eventually leading to the liberation of France and victory in Europe. This battle remains a significant moment in Allied efforts during World War II.