While the famous Berlin-based Red Orchestra spied for the Soviets in Germany, a separate and far more dangerous network operated inside the USSR itself: the Soviet Intelligence network in Switzerland led by Rachel Dübendorf (codename "Stern") fed critical intelligence to Moscow. But the most valuable Soviet agent in Europe was actually Richard Sorge's network in Tokyo — a German journalist who reported directly to Moscow that Japan would not attack the Soviet Union, allowing Stalin to transfer 18 divisions from Siberia to defend Moscow in December 1941. Without Sorge's intelligence, the Battle of Moscow might have had a very different outcome. Stalin called him a "great intelligence chief." Sorge was executed by Japan in 1944; Moscow only officially recognized him as a Hero of the Soviet Union in 1964, after Khrushchev's de-Stalinization.