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Hurricane in Galveston, Texas leaves an estimated 6,000 to 8,000 dead.
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President William McKinley is shot in Buffalo, New York. He dies on September 14, 1901 and is succeeded by his Vice President Theodore Roosevelt.
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Assassination of Austrian Archduke Franz Ferdinand leads to the start of WWI.
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The Treaty of Versailles brings an official end to WWI.
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The 18th Amendment to the U.S. Constitution is ratified, prohibiting the distribution of alcohol.
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The 19th Amendment of the U.S. Constitution is ratified, giving women the right to vote.
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Charles Lindbergh makes the first solo, nonstop transatlantic flight in his plane "The Spirit of St. Louis."
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The United States stock market crashes, leading to a decade long Great Depression.
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New Deal recovery measures are enacted by the U.S. Congress, helping to pull the United States out of the Great Depression
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The 21st Amendment to the U.S. Constitution is ratified, repealing the 18th Amendment of Prohibition.
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The Invasion of Poland marks the beginning of WWII.
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The United States declares war on Japan after the attack on Pearl Harbor.
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WWII ends with Japan formally surrendering aboard the U.S. battleship "Missouri."
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Political rivalrey between the United States and the Union of Soviet Socialist Republics (USSR) leads to the start of the Cold War
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Korean War begins when Communist North Korea forces invade Non-Communist South Korea. The war lasts until an armistice agreement is signed in 1953.
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The landmark Supreme Court decision of Brown v. Board declares that racial segregation in schools is unconstitutional.
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Conflicts between North and South Vietnam leads to the start of the Vietnam War.
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Martin Luther King, Jr., delivers his "I Have a Dream" speech during the civil rights march in Washington, DC.
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President John F. Kennedy is assassinated in Dallas, Texas. He is succeeded by his Vice President, Lyndon B. Johnson.
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Astronauts Neil Armstrong and Edwin Aldrin, Jr., become the first men to land on the Moon.
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Nixon resigns from the presidency after investigation begins to look into his involvement in the Watergate scandal.
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The Vietnam War ends with South Vietnam's surrender after the Fall of Saigon.
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The Cold War ends with the signing of the START I Treating, in which the U.S. and Soviet Union agree to reduce any further strategic nuclear arms.