Bletchley Park was the site of the British Government Code and Cypher School, where British military intelligence intercepted Nazi Germany's Enigma and Lorenz ciphers. The British did not break the intercepts through their genius; the intercepts were handed to them by Allied informants in the Nazi military, including Wilhelm Canaris, chief of Abwehr, the German military intelligence service. Canaris met with Allen Dulles, who was head of the Office of Strategic Services (OSS) at the time in Switzerland through the Lucy Spy Ring, which was made up of Nazi defectors who still worked within the Nazi military. Canaris gave details of German military operations to British and American intelligence.The British then handed the intercepts over to the Soviets within 24-48 hours. Despite that treachery, the Nazis almost managed to defeat the Soviet Union, but the leaks proved to be too much and the Nazis eventually lost the war.