 Complete the following phrase:  During World War II, Le Croisic was home to a radar station for the Wehrmacht following the surrender of France and construction of the U-boat submarine pens at Saint-Nazaire, in order to protect the Loire estuary from enemy attack due to the Normandie dry dock at Saint-Nazaire that could be used to repair the large Kriegsmarine battleships such as the and its sister ship, . However, in the March 1942 