At the start of the Second World War, the British set up the Political Warfare Executive to produce and distribute propaganda. Through the use of powerful transmitters, broadcasts could be made across Europe. Sefton Delmer managed a successful black propaganda campaign through several radio stations which were designed to be popular with German troops while at the same time introducing news material that would weaken their morale under a veneer of authenticity. British Prime Minister Winston Churchill made use of radio broadcasts for propaganda against the Germans.