The Atlantic Wall is one of the biggest construction projects in history a line of formidable defences stretching from the Pyrenees to the Norwegian Arctic but how effective was it? In this episode from the archive, James spoke to Dan about his recent History Hit documentary In Defence of the Reich: Hitler's Atlantic Wall. They discuss how and why the Atlantic Wall was built, Hitler's obsession with it, how effective it was and whether it could have ever been successful against an allied invasion.

Image credit: Bundesarchiv