1920 - 1930 By tharris16 Period: Jan 1, 1920 to Dec 31, 1929 1920 - 1930 Jan 16, 1920 Prohibiton officially begins 18th Amendment Feb 18, 1920 First Commercial Radio Broadcast Sep 5, 1921 Fatty Arbuckle Scandal Jan 11, 1922 Insulin is discovered Major medical breakthrough Jan 25, 1924 First Winter Olympic Games Apr 1, 1925 F. Scott Fitzgerald publishes The Great Gastby Aug 8, 1925 Klansmen March Aug 27, 1928 Kellogg-Briad Pact Nov 6, 1928 Herbert Hoover elected President Oct 28, 1929 Stock Market Crashes