The Normandy landings, codenamed Operation Overlord, was the military operation carried out by the Allies during World War II which culminated in the liberation of Western European territories occupied by Nazi Germany. The operation began on 6th June 1944, better known as D-Day, with the Allied invasion of 50km of the Normandy coast.,D-DAY,1944,The Normandy landings, codenamed Operation Overlord, was the military operation carried out by the Allies during World War II which culminated in the liberation of Western European territories occupied by Nazi Germany. The operation began on 6th June 1944, better known as D-Day, with the Allied invasion of 50km of the Normandy coast.,NORMANDY,1944,D-DAY,NORMANDY