Seeing an opportunity to strike a blow at the Soviet military, Heydrich immediately acted on the information and undertook to improve on it. Heydrich's forgeries were later leaked to the Soviets via Beneš and other neutral nations. While the SD believed that it had successfully fooled Stalin into executing his best generals, in reality, it had merely served as an unwitting pawn of the Soviet NKVD. Ironically, Heydrich's forgeries were never used at trial. Instead, Soviet prosecutors relied on signed "confessions" beaten out of the defendants.