United States History: 1920-1950 By ruffolor Jan 10, 1920 League of Nations Established Aug 18, 1920 Women Given Right to Vote Aug 20, 1920 American Professional Football League Formed Jun 2, 1924 Indian Citizen Act Jun 23, 1925 Radio Vision is Born Apr 1, 1927 The Great Mississippi Flood May 28, 1928 Mickey and Minnie Mouse First Appearance Jun 17, 1928 Amelia Earhart is the First Woman to Fly over Atlantic Oct 29, 1929 Stock Market Crash Jan 22, 1930 Empire State Building Construction Begins Feb 18, 1930 Pluto is Discovered Mar 31, 1931 National Anthem Approved Nov 8, 1932 FDR is Elected Period: Mar 9, 1933 to Jun 16, 1933 New Deal Programs are Passed Dec 5, 1933 21st Amendment Passed Jun 2, 1935 Babe Ruth Retires Aug 14, 1935 Social Security Act Passed Period: Jan 1, 1936 to Dec 31, 1936 Heat Wave, Great Depression, and FDR Reelection Period: Jan 1, 1937 to Dec 31, 1937 Flint, Michigan, and a Massacre Sep 1, 1939 WWII Starts Dec 7, 1941 Pearl Harbor Jun 4, 1942 Battle of Midway Period: Aug 1, 1942 to Feb 28, 1943 Guadalcanal Jun 6, 1944 D-Day Nov 7, 1944 Reelection of FDR Aug 6, 1945 Hiroshima and Nagasaki Oct 24, 1945 The United Nations Created Jun 5, 1947 Marshall Plan Jun 25, 1950 Korean War Begins