In history the system of fortifications became known as The Atlantic Wall (Der Atlantikwall), and was built to seal off Fortress Europe. The German propaganda machine created an image of an impregnable wall, showing the world the biggest guns and heavily defended coasts. Despite all efforts, the Atlantikwall failed, because the Allies invaded Normandy on the 6th of June 1944. The military significance of the defence line however, should not be underestimated at all. It is impressive how countries like Norway, Denmark, Germany, Holland, Belgium and France, received their part of Atlantikwall in such a short time.