By 18 June, Hitler and Ribbentrop spoke of the Plan with Italian leader Benito Mussolini as a possibility that could be pursued after the defeat of France.[18][19] Once he learned of the plan, SS-Obergruppenführer Reinhard Heydrich, chief of the Reich Main Security Office (RSHA), insisted that Ribbentrop relinquish any future responsibility for the Plan to that office. As Heydrich had been appointed by Göring in January 1939 to oversee Jewish evacuation from German-occupied territory, the Jewish question was hence under his purview.[19] Adolf Eichmann, head of the RSHA Sub-Department IV-B4, which dealt with Jewish affairs and evacuation, soon became involved. On 15 August, he released a memorandum titled Reichssicherheitshauptamt: Madagaskar Projekt (Reich Main Security Office: Madagascar Project), calling for the resettlement of a million Jews per year for four years and abandoning the idea of retaining any Jews in Europe.