Atlantic Wall
Although the defensive wall was never completed the Wall's existence was used to address concerns of the Soviet Union for why the Second Front was not opened until June 6, 1944 (less than a year before the end of the war).  The Wall primarily consisted of batteries, bunkers, and minefields, which during 1942–1944, stretched from the French-Spanish border to Norway (Festung Norwegen).  Many bunkers still exist, for example near Scheveningen, Den Haag, Katwijk and in Normandy.  In Oostende, Belgium the public may visit a well-preserved part of the defences.  That section consists of emplacements of the "Saltzwedel neu battery" and the "Stützpunkt Bensberg", consisting of several men’s quarters and the necessary facilities.  These constructions were used by a unit of German military engineers (Pionierstab) who were in charge of bunker construction.