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The U.S. government stopped sending soldiers to the South after the Civil War, and segregation laws started to be enforced.
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The U.S. fought Spain and won, gaining control of places like Puerto Rico, Guam, and the Philippines.
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A big war started in Europe, and many countries around the world got involved.
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The U.S. entered World War I and helped the Allies win against Germany and its partners.
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The stock market crashed, causing a worldwide economic disaster that lasted for many years.
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President Franklin D. Roosevelt introduced programs to help people find jobs and fix the economy after the Great Depression.
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Japan attacked the U.S. naval base at Pearl Harbor, which led the U.S. to enter World War II.
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After defeating Germany and Japan, World War II ended, and the United Nations was formed to help prevent future wars.
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The U.S. and the Soviet Union became the two main world powers and were in a long-lasting competition for power.
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The U.S. Supreme Court ruled that racial segregation in schools was unfair and unconstitutional.
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President John F. Kennedy was shot and killed while in office, which shocked the entire nation.
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This law ended discrimination based on race, color, religion, or gender in places like schools and jobs.
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American astronauts Neil Armstrong and Buzz Aldrin became the first humans to land on the moon.
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The Berlin Wall, which separated East and West Germany, was torn down, marking the end of the Cold War in Europe.
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The Soviet Union collapsed, and many new countries were formed after years of communist rule.
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A bombing took place at the World Trade Center in New York City, marking the first major terrorist attack on the U.S.
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A huge earthquake hit Haiti, killing over 160,000 people and leaving millions homeless.
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Scientists found the Higgs Boson, a tiny particle that helps explain how everything in the universe gets mass.
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A group of people stormed the U.S. Capitol, trying to stop Congress from certifying the results of the 2020 election.
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Russia started a war by invading Ukraine, causing a major international crisis and many deaths.