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The Signing of the United States Constitution occurred on September 17, 1787, at Independence Hall in Philadelphia, Pennsylvania.
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the battles of Lexington and concord were the first military engagements of the american revolutionary war.
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The United States Declaration of Independence is the pronouncement adopted by the Second Continental Congress meeting at the Pennsylvania State House in Philadelphia, Pennsylvania, on July 4, 1776.
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The siege of Yorktown, also known as the Battle of Yorktown, the surrender at Yorktown, German Battle or the siege of Little York, ending on October 19, 1781.
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the Boston massacre, known to the British as the incident on king street, was a confrontation on march 5, 1977.