大西洋の壁
Denmark supplied agricultural and industrial products to Germany as well as loans for armaments and fortifications. The German presence in Denmark, including the construction of the Danish part of the Atlantic Wall fortifications, was paid from an account in Denmark's central bank, "Nationalbanken". The Danish government had been promised that these expenses would be repaid later, but this never happened. The construction of the Atlantic Wall fortifications in Jutland cost 5 billion Danish kroner.