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Henry Ford introduced a new more efficent way to build a product with an assembly line in 1908.
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The Palmer Raids, a series of mass arrests, began in 1919.
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60,000 Seattle area workers were labled as reds for going on strike.
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6,000 people were arrested for having guns in their homes.
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In 1920 9% of women worked in an industrial setting.
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After one year of mass arrests the Palmer Raids finally ended in 1929.
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The modern radio was invented in 1920. It helped national news travel faster and helped many other smaller things possible too such as advertising.
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The modern traffic light was invented in 1920 which made the roads much safer. It also kept police officers, who used to direct traffic, much safer too.
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The invention of the tractor made farming easier and more mangable. With the tractor farmers could plant the entire farm instead of just one field.
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The Prohibition act was ratified by 36 states and was effective on Janruary 16, 1920.
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In 1920 the first African American profesional sports league was established.
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The 19th amendment, which allowed women to vote, was ratified on August 8, 1920.
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In 1921 a national-origin policy was issued to limit the number of new immigrants entering America.
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In 1922 an anti-lynching law was passed by congress which gave African Americans more safety and dignity.
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The invention of the bulldozer replaced the hand shovle and made the job of digging or pushing things around much faster.
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This act was established on Janruary 1, 1924 to limit the number of immigrants that were admitted into the United States.
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The Immigration Act of 1924 was issued as the permenant replacement to the 1921 National-Origins policy. It allowed only 2% of the number of people from that country to be admitted into America.
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In 1925 a KKK mob in Mississippi were responsible for the hanging of two negro men.
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On March 1, 1925 the KKK was responsible for shooting a minister dead. This minister was known for preaching equality.
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The first car in America, the Modle T Ford,
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In 1920 the most widley used antibiotic, Penicillin, was invented. Although it was not widley used at the time of its invention.
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President Roosevelt allowed the production of some alcoholic beverages.
