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An informal agreement that resolved the disputed 1876 presidential election, leading to the withdrawal of federal troops from the South and marking the end of the Reconstruction era.
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Marked the U.S.'s emergence as a world power, gaining control over Guam, Puerto Rico, and the Philippines.
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After repeated attacks on American ships and the Zimmermann Telegram, the U.S. joined the Allies in World War I.
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Triggered the Great Depression, causing massive unemployment and economic turmoil across the U.S.
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Japan's surprise attack on Pearl Harbor led to the U.S. entering World War II.
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Allied troops landed in Normandy, France—turning the tide of World War II against Nazi Germany.
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The Supreme Court declared racial segregation in schools unconstitutional, fueling the civil rights movement.
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Outlawed discrimination based on race, color, religion, sex, or national origin.
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Neil Armstrong became the first human to walk on the moon, a major Cold War victory for the U.S.
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Led to President Nixon’s resignation—the only U.S. president to resign from office.
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Terrorist attacks on the World Trade Center that killed nearly 3,000 people and led to the War on Terror.
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The U.S. invaded Iraq claiming weapons of mass destruction were present—none were found.
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A devastating hurricane that flooded New Orleans and exposed issues of poverty and government response.
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Barack Obama became the first African American president in U.S. history.
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The Supreme Court legalized same-sex marriage nationwide.
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A global health crisis that shut down economies, schools, and changed daily life around the world.
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Mass protests erupted nationwide against police brutality and racial injustice after George Floyd's death.
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Supporters of President Trump stormed the Capitol in an attempt to overturn the 2020 election results.
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Major tech companies slashed jobs while artificial intelligence tools like ChatGPT and DeepSeek reshaped industries.
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The Supreme Court ended federal abortion protections, allowing states to regulate or ban the procedure.