As well, Palestine was at the time under British control.[23] Rademacher recommended that the French colony of Madagascar should be made available as a destination for the Jews of Europe as one of the terms of the surrender of France, which the Germans had invaded on 10 May 1940.[24] The resettled Jews, noted Rademacher, could be used as hostages to ensure "future good behaviour of their racial comrades in America".[18] The plan was developed by Referat D III of the Abteilung Deutschland.[25]