The American Civil Rights Movement was a social and political struggle from the 1950s to 1960s in which African Americans and their allies fought against racial segregation and discrimination to gain equal rights and opportunities. The movement used nonviolent protests, legal action, and activism to achieve major changes in American laws and society.

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Apollo 11 landed on the moon on July 20, 1969, when astronauts Neil Armstrong and Buzz Aldrin descended to the lunar surface in the Lunar Module while Michael Collins orbited above in the Command Module. The mission was the result of a decade of NASA training, rocket development, and spaceflight experience.

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World War II was caused by a combination of factors including the harsh Treaty of Versailles that punished Germany after World War I, the global economic depression of the 1930s, the rise of aggressive dictators like Adolf Hitler and Benito Mussolini, and the failure of the League of Nations to prevent military aggression.

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The Roman Empire fell due to a combination of factors including military pressure from Germanic tribes, economic weakness, political instability, and the empire becoming too large to govern effectively. The Western Roman Empire officially collapsed in 476 CE when the last emperor was overthrown.

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The Egyptian pyramids were built by thousands of workers who used copper tools, wooden sledges, and ramps to quarry, transport, and stack massive stone blocks over many years. The exact methods continue to be studied by archaeologists, but evidence shows workers used organized labor systems, water to reduce friction, and careful planning to construct these monuments.

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