1920 Prohibition begins.
Women get the vote.
Warren G. Harding elected president.
1921 Sheppard-Towner Act.
Congress restricts immigration.
1922 Five-Power Naval Treaty.
1923 Equal Rights Amendment defeated in Congress.
Harding dies; Vice President Calvin Coolidge becomes president.
1924 Dawes Plan.
Coolidge elected president.
Johnson-Reed Act.
Indian Citizenship Act.
1925 Scopes trial.
1927 Charles Lindbergh flies nonstop across the Atlantic.
Nicola Sacco and Bartolomeo Vanzetti executed.
1928 Kellogg-Briand pact.
Herbert Hoover elected president.
1929 St. Valentine's Day murders.
Agricultural Marketing Act.
Publication of Middletown.
Stock market collapses.
1930 Congress authorizes $420 million for public works projects.
Hawley-Smoot tariff.
1931 Scottsboro Boys arrested.
Harlan County, Kentucky, coal strike.
1932 River Rouge factory demonstration.
Reconstruction Finance Corporation established.
National Farmers' Holiday Association formed.