Late in World War II, while Germany sustained relentless bombing by the Allies, the Nazis undertook a bold gambit to turn the war back in their favor. Building an extensive tunnel system dee... Read allLate in World War II, while Germany sustained relentless bombing by the Allies, the Nazis undertook a bold gambit to turn the war back in their favor. Building an extensive tunnel system deep underground to house armament factorLate in World War II, while Germany sustained relentless bombing by the Allies, the Nazis undertook a bold gambit to turn the war back in their favor. Building an extensive tunnel system deep underground to house armament factor