Rademacher recommended on 3 June 1940 that Madagascar should be made available as a destination for the Jews of Europe. With Adolf Hitler's approval, Adolf Eichmann released a memorandum on 15 August 1940 calling for the resettlement of a million Jews per year for four years, with the island being governed as a police state under the SS. They assumed that many Jews would succumb to its harsh conditions should the plan be implemented. The plan was not viable due to the British naval blockade. It was postponed after the Nazis lost the Battle of Britain in September 1940, and it was permanently shelved in 1942 with the commencement of the Final Solution, the policy of systematic genocide of Jews, towards which it had functioned as an important psychological step.