The famous battle that took place on June 6, 1944, during World War II is known as D-Day or the Normandy Invasion. Allied forces launched a massive operation to invade German-occupied France, landing on the beaches of Normandy. This operation was one of the largest amphibious assaults in history, involving troops from the United States, United Kingdom, Canada, and other Allied nations. The success of D-Day marked a turning point in the war as it established a foothold in Europe for the Allies, leading to the liberation of France and ultimately contributing to the defeat of Nazi Germany.