The Kremlin gave much greater attention to signals intelligence in evaluating threats from Japan from 1931 to 1941 than it did to the intelligence that was gathered by the Sorge spy ring, but since Soviet intelligence did not like to mention the achievements of its codebreakers, Soviet propaganda from 1964 onward gloried Sorge as a "hero spy" and avoided all mention that the Soviets had broken the Japanese codes. The Soviets, during the Cold War, liked to give the impression that all of their intelligence came from human intelligence, rather than signals intelligence, to prevent Western nations from knowing how much the Soviets collected from the latter source. A testament to Sorge's fame in the Soviet Union was that even though Sorge worked for the GRU, not the NKVD, it was the KGB, which had far more power than the Red Army, that claimed him as one of its "hero spies" in the 1960s.