The formal name of the organization was the 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 made the discovery of the Rote Kapelle, the 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.