Gustave Bertrand

Gustave Bertrand

Gustave Bertrand (1896 – 1976) was a French military intelligence officer who made a vital contribution to the decryption, by Poland's Cipher Bureau, of German Enigma ciphers beginning in December 1932. This achievement would in turn lead to Britain's celebrated Ultra operation in World War II.

Bertrand joined the French military as a private in 1914 and was wounded in 1915 at the Dardanelles. From 1926, he worked in radio intelligence. From 1930, he supervised work on German ciphers in the Services de Renseignement.

Bertrand's intelligence associates had purchased documents pertaining to the Enigma machine from Hans-Thilo Schmidt (codenamed "Asché" by the French), an employee at the German Armed Forces' Cryptographic Agency. In December 1932, then-Captain (later, General) Bertrand turned these documents over to the Polish Cipher Bureau's chief, Major Gwido Langer. Asché's documents, according to cryptologist Marian Rejewski's testimony, proved in practice crucial to his mathematical solution of the military Enigma machine's wiring. During his work with the Poles, Bertrand used the code name "Bolek", given him by the Poles.

Bertrand was to learn of the Poles' success against Enigma only six and a half years later, at a trilateral Polish-French-British conference held in the Kabaty Woods, south of Warsaw, on July 25, 1939, just five weeks before the outbreak of World War II.

After Germany's invasion of Poland in September 1939, the then-Major Bertrand from October 1939 to November 1942 sponsored the continued work of key prewar Cipher Bureau personnel at "PC Bruno" outside Paris and, after Germany's invasion of France in May-June 1940, at the Cadix center in southern France's Vichy "Free Zone."

Over a year after the Cadix center had been scattered to avert capture by the Germans, on January 5, 1944, Bertrand was captured by the Germans as he waited at the famous Church of Sacré Cœur, in Paris' Montmartre district, for a courier from London. The Germans suggested that he work for them. Pretending to agree, Bertrand was allowed to return with his wife Mary to Vichy to contact British intelligence. There he sent his underground comrades into hiding and went into hiding himself. On June 2, 1944, four days before the D-Day Normandy landings, at an improvised airstrip in France's Massif Central, Bertrand, his wife and a Jesuit priest who served as a courier of the Polish Resistance climbed into a small, unarmed Lysander III aircraft that flew them to the British Isles.

Bertrand retired from the French Secret Service in 1950 and went on to become mayor of Théoule-sur-Mer in southern France.

In 1973, the Paris publishing house Plon published his book, "Enigma ou la plus grande énigme de la guerre 1939-1945" ("Enigma or the Greatest Enigma of the War of 1939-1945"). The book, one of the principal primary sources on the history of Enigma decryption, for the first time gave a detailed account of the some eleven years of Franco-Polish collaboration in breaking and reading Enigma before and during World War II.

References

*Władysław Kozaczuk, "Enigma: How the German Machine Cipher Was Broken, and How It Was Read by the Allies in World War Two", edited and translated by Christopher Kasparek, Frederick, MD, University Publications of America, 1984.
* Jacek Tebinka, "Account [by] the former Chief of Polish intelligence [dated 31 May 1974] on [the] cracking [of] the Enigma code," footnote 19, p. 210, in Jan Stanislaw Ciechanowski, ed., "Marian Rejewski 1905–1980, Living with the Enigma secret", 1st ed., Bydgoszcz City Council, 2005, ISBN 83-7208-117-4.


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