The world between the wars By USA1492 Period: Jun 1, 1921 to Jan 1, 1924 Hyperinflation in Germany May 17, 1922 Joseph Stalin becomes leader of the Soviet Union May 7, 1936 Hitler sends troops to Rhineland Period: Jul 17, 1936 to Apr 1, 1939 Spanish civil war Oct 10, 1938 Germany annexes Sudetenland Aug 23, 1939 Hitler and Stalin sign non-aggression pact May 17, 2017 Germany invades poland May 17, 2017 The manchurian incident May 17, 2017 Anschluss May 17, 2017 US passes Neutrality Acts May 17, 2017 Hitler writes Mein Kampf