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The establishment of Jamestown, Virginia, the first permanent English settlement in North America.
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The signing of the Declaration of Independence, which declared the United States as an independent nation.
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he American Civil War, which resulted in the abolition of slavery and the reunification of the country.
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The passage of the 19th Amendment, which granted women the right to vote in the United States.
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The start of the Great Depression, a severe economic downturn that lasted for a decade.
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The United States' entry into World War II after the attack on Pearl Harbor by Japan.
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The Montgomery Bus Boycott, a civil rights movement that challenged racial segregation in public transportation in Montgomery, Alabama.
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The March on Washington for Jobs and Freedom, where Martin Luther King Jr. delivered his famous "I Have a Dream" speech.
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The Woodstock Music and Art Fair, a seminal event in the counterculture movement of the 1960s.
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The Watergate scandal, which led to the resignation of President Richard Nixon.
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The first national celebration of Martin Luther King Jr. Day as a federal holiday.
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The Oklahoma City bombing, a domestic terrorist attack that killed 168 people and injured over 600 others.
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The September 11 terrorist attacks, in which 2,977 people were killed in New York City, Washington D.C., and Pennsylvania.
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The election of Barack Obama as the first African American President of the United States.
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The passage of the Affordable Care Act, also known as Obamacare, which expanded access to health care for millions of Americans.
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The legalization of same-sex marriage in all 50 states by the U.S. Supreme Court.
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The Women's March, a global protest in response to the inauguration of President Donald Trump and his policies.
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The COVID-19 pandemic, which resulted in widespread illness, death, and economic disruption.
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The Black Lives Matter protests, a movement against police brutality and systemic racism that was sparked by the killing of George Floyd in Minneapolis.
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The planned opening of the Obama Presidential Center in Chicago, Illinois, which will serve as a museum and public space dedicated to the legacy of Barack Obama.