"1939 - 1945" . . "Siegfried Line (Germany)" . . "Germany" . . . . "Hitlers' West Wall : strategy in concrete and steel 1938-1945"@en . . "History"@en . . . . . . . . "Hitler's West Wall : strategy in concrete and steel, 1938-1945"@en . "Hitler's West Wall strategy in concrete and steel, 1938-1945"@en . "Hitler's Westwall: strategy in concrete and steel, 1938-1945"@en . . . . . . . . . . "Hitler's Westwall : strategy in concrete and steel, 1938-1945"@en . . . . .