"Berlin Defense Area" was just another phrase, like "Fortress" (Festung), coined by German dictator Adolf Hitler.
During the waning months of World War II, as the Soviet army advanced into Silesia and encircled Fortress (Festung) Breslau, Hanke was named by Hitler to be the city's "Battle Commander" (Kampfkommandant).
Festung | Festung Warschau | Demonstration on November 2013 in Vienna from identitarian patriots for a ''Festung Europa'' and against Morten Kjærum |
The Festungsfront Oder-Warthe-Bogen (Fortified Front Oder-Warthe-Bogen), also called the Festung im Oder-Warthe-Bogen or Ostwall (East Wall), and in Polish the Międzyrzecki Rejon Umocniony (Międzyrzecz Fortification Region), was a fortified military defence line of Nazi Germany between the Oder and Warta rivers.