In the summer of 1944, the Allied forces launched a massive, coordinated amphibious invasion of Normandy, France, to break the German hold on Western Europe. The operation, known as D-Day, involved a complex deception campaign to mislead German commanders about the location of the main assault. Despite facing fierce resistance and challenging terrain, the Allied troops successfully established beachheads and began their push into the heart of France, marking a turning point in the war.