The major battle in 1944 that was one of the largest amphibious assaults in history was the Battle of Normandy, commonly known as D-Day. On June 6, 1944, Allied forces launched a massive invasion of Nazi-occupied France, landing on the beaches of Normandy. This operation involved over 156,000 troops from various nations, including the United States, the United Kingdom, and Canada, and marked a critical turning point in World War II. The successful invasion provided the Allies with a foothold in Europe, enabling further offensives against German forces and ultimately leading to the liberation of Western Europe from Nazi control.