Cadix

Cadix was a World War II clandestine intelligence center at Uzès, on the Mediterranean coast in southern France, from September 1940 to 9 November 1942. During this period southern France was under the control of Vichy France and not occupied by Nazi Germany. At Cadix, the predominantly Polish team of cryptanalysts who had previously worked at PC Bruno was reassembled, and worked against German and other Axis ciphers, including the German Enigma machine cipher. Cadix shut down when Germany occupied southern France.

After the German conquest of Poland in 1939, key personnel of the Polish Cipher Bureau escaped to France. Major Gustave Bertrand of French intelligence established PC Bruno, where the Poles worked with French experts and British codebreakers at Bletchley Park to break Enigma.

During the German invasion of France, PC Bruno had to be evacuated. On 22 June 1940, France signed an armistice with Germany. Two days later, Major Bertrand flew the essential personnel of PC Bruno to French-controlled Algeria.

Bertrand remained an officer of the official French intelligence service, nominally controlled by "Vichy France", the quasi-collaborationist regime headed by Marshal Pétain. But Bertrand and the service retained substantial independence.

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