1920

President Wilson asks voters to endorse the League of Nations

On August 18 The Nineteenth Amendment is ratified, giving women the right to vote

The Merchant Marine Act is passed

The Prohibition Amendment becomes law

The ACLU is founded (unions)

1921

Armistice Day is declared a legal holiday

The Federal Highway Act is signed into law

Congress halts immigration with tough quota laws

Mrs. W.H. Felton of Georgia becomes the first woman in the U.S. Senate

President Harding pardons Eugene V. Debs, convicted of violating the 1917 Espionage Act

1922

The Washington Conference ends the naval arms race

Albert Fall gives Mammoth Oil Company the rights to Teapot Dome oil reserves

1923

President Harding dies; Coolidge is sworn in as president

The Teapot Dome scandal comes to light

1924

Miriam Furguson of Texas and Nellie Ross of Wyoming are elected governors on the same day.

The U.S. grants full citizenship to Native Americans

J. Edgar Hoover is appointed director of the FBI