 'Cicero' is the SD code name given by the Germans to Elyesa Bazna, a valet for the British ambassador Sir Hughe Knatchbull-Hugessen in the city of Ankara in Turkey, a neutral country during World War II.The information that he leaked is believed to have been potentially among the more damaging disclosures made by a Second World War spy but conflicts inside the highest echelons of the German government meant that little if any of it was acted upon.At the end of the World War II, he was aggressively interviewed by the Allies and gave witness during war trials at Nuremberg, after which he wrote a book to address rumors and explain his role during the war.