1921-1941.

  • Harding

    Warren Harding is inaugurated as the 29th president.
  • Coolidge

    President Harding dies and is succeeded by vice president, Calvin Coolidge. Coolidge the becomes the 30th U.S. President.
  • Butler Act

    Tennessee passes a law against the teaching of evolution in public schools, remaining enforced for 40 years.
  • First nonstop solo flight across the tranatlantic

    Charles Lindbergh makes the first solo nonstop transatlantic flight in his plane, The Spirit of St. Louis.
  • Hoover

    Herbert Hoover is inaugurated as the 31st president.
  • The Star-Spangled Banner

    The Star-Spangled Banner is adopted as the national anthem.
  • Hattie Wyatt Caraway

    Hattie Wyatt Caraway of Arkansas is the first woman elected to the U.S. Senate. This was to fill a vacancy caused by the death of her husband.
  • Amelia Earhart

    Amelia Earhart completes first solo nonstop transatlantic flight by a woman.
  • World War II

    World War II begins due to an unprovoked attack on Poland started by Germany. This war caused some of the most destructive conflict in history.