The Regelbau (German Standard Bunker Design) were a series of standardised bunker designs built in large numbers by the Germans in the Atlantic Wall (German Atlantikwall) and the Siegfried Line (German Westwall) as part of their defensive fortifications p

The Regelbau (German Standard Bunker Design) were a series of standardised bunker designs built in large numbers by the Germans in the Atlantic Wall (German Atlantikwall) and the Siegfried Line (German Westwall) as part of their defensive fortifications p
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