The invasion of Normandy, or the Normandy Campaign, was a battle fought between Germany and the Allies during World War 2. The Allied forces launched an amphibious and airborne assault on the French province of Normandy and were able to establish a beachhead in France and advance inland. The invasion was code named Operation Overlord. It is considered to be the largest amphibious operation in history. The campaign ended when French and American troops liberated Paris.