ヴァルキューレ作戦
German General Ludwig Beck, the former German Army Chief of Staff, died after the attempt on Hitler's life during Operation Valkyrie, although the Nazi regime never acknowledged his death. During the Joker Campaign a Morale Operations agent, pretending to be Beck, broadcast several messages from London to German soldiers and civilians. These messages blamed German losses on Nazi incompetence and urged the German people to overthrow Hitler and sue for peace in hopes that this would stop the Allies from annihilating their country.