Führerhauptquartier Wolfsschanze
They traveled a great deal, going from the East Prussia "Wolfsschanze" (Wolf's Lair), to the Berghof, to Munich, to the "Reichskanzlei" (Reich Chancellery) and back, all by way of train. Once the Red Army began sweeping across eastern Europe after Stalingrad fell, the "Wolfsschanze" had to be abandoned.