The Funkabwehr, "Radio Defense Corps," was a radio counterintelligence organization created in 1940 by Hans Kopp of the German Nazi Party High Command during World War II. It was the principal organization for the monitoring of illicit broadcasts. The formal name of the organization was Funkabwehr des Oberkommandos der Wehrmacht (German: Oberkommando der Wehrmacht, Wehrmachtnachrichtenverbindungen, Funküberwachung) (OKW/WNV/FU).[1][2] Its most notable breakthrough occurred on 26 June 1941, when tracing teams at the Funkabwehr station at Zelenogradsk discovered the Rote Kapelle, an anti-Nazi resistance movement in Berlin and two Soviet espionage rings operating in German-occupied Europe and Switzerland during World War II.[3] The Funkabwehr was dissolved on 30 April 1945.