Later, SS-Oberführer Walter Schellenberg claimed in his memoirs that he had compiled the list,[3] starting at the end of June 1940.[4] It contained 2,820 names of people, including British nationals and European exiles, who were to be immediately arrested by SS Einsatzgruppen upon the invasion, occupation, and annexation of Great Britain to the Third Reich. Abbreviations after each name indicated whether the individual was to be detained by RSHA Amt IV (the Gestapo) or Amt VI (Ausland-SD, Foreign Intelligence).[2]