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Oct 12, 1492
Columbus finds America
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Industrial Revolution
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French and Indian War
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Revolutionary War
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Boston Tea Party
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Writing of the Constitution
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Ratification of Delaware
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Ratification of Pennsylvannia
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Ratification of New Jersey
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Ratification of Georgia
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Ratification of Connecticut
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Ratification of Massachusetts
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Ratification of Maryland
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Ratification of South Carolina
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Ratification of New Hampshire
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Ratification of Virginia
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Ratification of New York
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Ratification of North Carolina
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Ratification of Rhode Island
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Expedition of Lewis and Clark
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Missouri Compromise
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Bleeding Kansas
Can't find an exact date.