A retired major from British military intelligence reveals how Ultra, a top secret decoding device, was used by the Allies against the Nazis in France and Germany.
First Edition. 305 p. : ill. ; 24 cm. Includes index. Bibliography: p. [248]-250. #0921
World War, 1939-1945 — Campaigns — France — Normandy. | World War, 1939-1945 — Cryptography. | World War, 1939-1945 — Secret service — Great Britain. | Normandy (France) — History.