D-Day, which occurred on June 6, 1944, was a pivotal moment in World War II. Allied forces launched a massive invasion on the beaches of Normandy, France, marking the beginning of the liberation of Western Europe from Nazi occupation. This operation involved over 156,000 troops from the United States, United Kingdom, Canada, and other nations, making it one of the largest amphibious assaults in history. The success of D-Day was crucial for the Allies, as it established a strong foothold in Europe. The operation faced fierce resistance from German forces, but the bravery and determination of the soldiers led to a significant turning point in the war, ultimately contributing to the defeat of Nazi Germany.