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Germany and the Allies sign an armistice to end the fighting in World War 1
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Congress ratifies the 18th Amendment, prohibiting the sale of alcohol anywhere in the United States.
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The resulting overproduction causes a collapse in prices, with cotton falling to less than 10 cents a pound by early 1921.
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Congress passes the Fordney-McCumber Tariff, sharply raising tariff duties to protect the American market for American manufactures.
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Yankee Stadium, the "House that Ruth Built," is constructed in the Bronx, New York.
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Walt Disney's Steamboat Willie premieres, introducing the world to a new animated character: Mickey Mouse.
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The American stock market collapses, signaling the onset of the Great Depression.