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The technology progressed after World War 1 creating a huge economic boom known as the roaring 20s.
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The League of Nations the first worldwide intergovernmental organisation whose principal mission was to maintain world peace.
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Woodrow Wilson was president from 1913 until 1921
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October 29, 1929, Black Tuesday hit Wall Street as investors traded some 16 million shares on the New York Stock Exchange in a single day. Billions of dollars were lost, wiping out thousands of investors.
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The Dust Bowl was a time period during the 1930s when the Southern PLains suffered from severe drought.
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Hoover Dam is a concrete arch-gravity dam in the Black Canyon of the Colorado River, on the border between the U.S. states of Nevada and Arizona.
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The Hindenburg was an airship that crashed on May 6, 1937
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September 1,1939 World War 2 starts but it wasn't until September 7,1941 when the UNited States got involved after the bombing of Pearl Harbor.