Polish people were being displaced from their homes to have Germans move instead. Himmler wasn't a huge supporter of the initial treatment of the Poles, because he felt that many of them were of mixed German blood or were actually German, so instead he proposed that after the war that the Polish population be inspected. Initially, Hitler's regime wanted to move the Jews to Madagascar, this was called the Madagascar Plan. The Madagascar Plan fell through after Germany was unable to defeat Britain and this is when the idea of genocide began to firmly develop and it was after the invasion of the Soviet Union in June 1941, that the Nazis decided to eradicate the Jewish people. A bureaucracy was created to organize the murder of Jews. Mobile killing squads called the Einsatzgruppen were first seen during Anschluss. During the invasion of Poland 16,000 Poles and Jews were murdered by the German Army and the Einsatzgruppen. After the invasion of the Soviet Union the Nazi had 1 million Jews under their control. On July 31, 1941 Goering sent a letter to Heydrich that read "send me, as soon as possible, a draft setting up details of the preliminary measures taken in the organizational, technical and material needs for the achievement of the 'final solution' which we seek,” (49) it is clear from reading this quotation that the seeds for genocide had been planted.