The Soviets and Ultra

Summary Report of the State of the Soviet Military Sigint in November 1942 Noticing “ENIGMA”

“…Moreover, starting with the first phase of the Stalingrad battle, special units began a radioelectronic war with the German radio stations, deceiving them and interrupting communication between them by jamming. 10 Achievements appeared gradually, but they became more visible by 1942.…”