Prosperity, Depression, and World War II By jeremyeve Period: Jan 21, 1920 to Dec 21, 1945 Prosperity to WWII Mar 4, 1921 Warren Gamaliel Harding becomes president Jul 29, 1921 Adolph Hitler becomes the leader of the Nazi Party Oct 29, 1922 Fascist leader Benito Mussolini is appointed the Premier of Italy Mar 4, 1923 Calvin Coolidge becomes president May 21, 1927 Charles Lindbergh makes first trans-Atlantic flight Mar 4, 1929 Herbert Hoover becomes president Oct 29, 1929 Great Depression begins Mar 4, 1933 Franklin Delano Roosevelt becomes president Jul 27, 1933 Japan and Germany withdraw from League of Nations Mar 29, 1934 Reciprocal Trade Agreements Act May 11, 1934 Dust Bowl begins Aug 14, 1935 Social Security Act Dec 7, 1941 Japan attacks Pearl Harbor Dec 8, 1941 U.S. enters World War II Jun 6, 1944 D-Day Dec 16, 1944 Battle of the Bulge Apr 12, 1945 Harry S. Truman becomes president Apr 12, 1945 U.S. takes Okinawa May 7, 1945 Germany surrenders from WWII Aug 6, 1945 Atomic bomb dropped on Hiroshima and Nagasaki Sep 2, 1945 Japan Surrenders, ending WWII Oct 24, 1945 U.S. joins the United Nations
