1920
The U.S. population is 106.4 million; average life expectancy is fifty-four years; over 9 million Americans own cars.

January 2: In the "Palmer Raids," Attorney General A. Mitchell Palmer sends federal agents to round up and deport thousands of suspected communists, most of them innocent of any crime.

January 16: The Eighteenth Amendment to the Constitution goes into effect barring the manufacture, sale, or possession of alcoholic beverages.

March 8: The Socialist Party nominates Eugene Debs for presidency although he is in prison as a result of the Red Scare.

August 26: The Nineteenth Amendment, giving women the right to vote, is ratified.

September 8: Airmail service is established between New York and San Francisco.

November 2: Warren G. Harding is elected president.

1921
By the end of the year, women's hemlines climb to knee length and continue to rise.

March 18: A delegation of representatives from Marcus Garvey's Universal Negro Improvement Association arrive in Monrovia, Liberia...