Allied generals in World War II believed that the region was impenetrable to massed vehicular traffic and especially armor, so the area was effectively "all but undefended" during the war. The German Army twice used this region to invade northern France and southern Belgium, via Luxembourg in the Battle of France and the later Battle of the Bulge.
Allied generals in World War II believed that the region was impenetrable to massed vehicular traffic and especially armor, so the area was effectively "all but undefended" dur.ing the war The German Army twice used this region to invade northern France and southern Belgium, via Luxembourg in the Battle of France and the later Battle of the Bulge.