On 5 December 1940, Quisling flew to Berlin to negotiate the future of Norway's independence. By the time he returned on 13 December, he had agreed to raise volunteers to fight with the German "Schutzstaffel" (SS). In January, SS head Heinrich Himmler travelled to Norway to oversee preparations. Quisling clearly believed that if Norway supported Nazi Germany on the battlefield, there would be no reason for Germany to annex it. To this end, he opposed plans to have a German SS brigade loyal only to Hitler installed in Norway. In the process, he also toughened his attitude to the country harbouring the exiled king, the United Kingdom, which he no longer saw as a Nordic ally. Finally, Quisling aligned Norwegian policy on Jews with that of Germany, giving a speech in Frankfurt on 26 March 1941 in which he argued for compulsory exile, but warned against extermination.