1 Jan 1919: 18th Amendment ratified The 18th Amendment, which prohibited the manufacture, sale, or transportation of alcoholic beverages, was ratified.
2
1920
19 Jan 1920: Prohibition begins The Volstead Act went into effect, implementing the 18th Amendment.
18 Aug 1920: 19th Amendment ratified The 19th Amendment was ratified, granting American women the right to vote.
3
1921
1 Jan 1921: Emergency Quota Act Congress passed a law limiting the number of immigrants from any country to 3% of the people from that country already living in the U.S.
4
1924
1 Jan 1924: Immigration Act of 1924 A law that further restricted immigration, establishing a national origins quota.
5
1925
21 Jan 1925: Scopes "Monkey" Trial A high school teacher, John Scopes, was tried for teaching evolution in a highly publicized trial.
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1927
1 Jan 1927: Charles Lindbergh's solo flight Charles Lindbergh completed the first solo, nonstop transatlantic flight from New York to Paris.