After the fall of Sicily during the summer of 1943, the Germans grew wary of a potential Italian defection to the Allies. To counter this event the 2nd Fallschirmjäger Division was transferred from France to Rome on 6 August. Heydte gained audience with Pope Pius XII and befriended the Pope's "Throne Assistant", the theologian Alois Hudal, who would later become a key person in helping Nazi war criminals evade the courts of justice during the post-war war-crime trials. The division participated in taking Rome under German control as part of the German Operation Achse.