Events leading up to WW2 By vanaceve057 Jan 30, 1933 Hitler becomes Chancellor of Germany Mar 12, 1933 First concentration camp opened at Oranienburg outside Berlin. Oct 14, 1933 Germany quits the League of Nations Jul 25, 1934 Nazis murder Austrian Chancellor Dollfuss. Aug 19, 1934 Adolf Hitler becomes Führer of Germany. Sep 15, 1935 German Jews stripped of rights by Nuremberg Race Laws Nov 5, 1937 Hitler reveals war plans during Hossbach Conference Mar 13, 1938 Germany announces a union with Austria. Mar 15, 1939 Nazis take Czechoslovakia Aug 25, 1939 Britain and Poland sign a Mutual Assistance Treaty Sep 1, 1939 Nazis invade Poland; Start of WW2