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Early American History (1776-1860)
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Civil War/Reconstruction (1860-1877)
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The Gilded Age (1877-1900)
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The Progressive Era (1890-1920)
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Imperialism (1898-1910)
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World War I (1914-1918)
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Roaring Twenties (1920-1929)
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Great Depression (1929-1939)
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World War II (1939-1945)
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United Nations formed
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Early Cold War (1945-1960)
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22nd Amendment
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Truman Doctrine
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Berlin Airlift
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Marshall Plan
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NATO established
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Korean War
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Civil Rights Era (1950-1970)
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Rosenbergs trial
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First H-Bomb detonated by the United States
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Vietnam War (1954-1976)
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Jonas Salk invents the Polio Vaccine
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USSR launches Sputnik
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End of the Cold War (1970-1991)
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1990s-21st Century (1990-2008)