On June 6, 1944, known as D-Day, Allied forces launched a massive invasion of German-occupied France during World War II. This operation, called Operation Overlord, involved over 156,000 troops from the United States, United Kingdom, Canada, and other nations landing on five beachheads in Normandy. The goal was to establish a foothold in Europe and begin the liberation from Nazi control. The invasion was marked by intense fighting and significant casualties, but it ultimately succeeded in breaching German defenses. D-Day is considered a turning point in the war, leading to the eventual defeat of Nazi Germany and the liberation of occupied territories across Europe.