Why did hitler decide that Germany needed to sign the Nazi-Soviet Nonaggression pact?

Answer 1

Hitler signed the Nazi-Soviet Nonaggression Pact in August 1939 to clear the way for his attack on Poland on September 1, that started World War II. Earlier in 1939, the Western Allies, Britain and France, had made overtures to the Soviet Union and had also guaranteed Poland against attack. Hitler thought that his agreement with Stalin would not only prevent the Soviet Union from interfering, but would also convince Britain and France that it was useless to resist Germany's overwhelming invasion of Poland. In addition, Hitler gained supplies of valuable raw material from the Soviet Union from the pact, which would enable the continued expansion of his overstretched war economy. However, he was shaken by the response of Britain and France, who declared war in early September in accordance with their guarantee of Poland.