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        On October 12, 1492, Christopher Columbus set foot on the American continent. - 
  
  
        The settlers of the mayflower. May 14, 1607-1699. - 
  
  
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        December 16, 1773, In defiance of Britain, the Sons of Liberty dumped 342 chests of tea in the harbor. - 
  
  
        The famous "shot heard 'round the world" was in the batttle of Lexington and Concord on April 19, 1775. - 
  
  
        The Declaration of Independence passed in the continental congress on July 2nd, 1776, and was ratified and sent to be printed on July 4, 1776. - 
  
  The battle of Yorktown was fought for 22 days, from Sep 28, 1781 – Oct 19, 1781.
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  The Constitutional Convention was held from May 25, 1787, to Sep 17, 1787.
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  This revolutionary invention was created in 1794.
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  The Alien and Sedition Acts were created on June 18, 1798.
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        In 1803, Thomas Jefferson bought Louisiana from France. - 
  
  Despite its name, the war of 1812 lasted from Jun 18, 1812, until Feb 18, 1815, nearly three years later.
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  March 6, 1820
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  The Trail of Tears was part of a series of forced displacements of approximately 60,000 Native Americans between 1830 and 1850
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        The first message in history was transmitted on May 24, 1844 at 8:45 a.m. - 
  
  Apr 25, 1846 – Feb 2, 1848
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        From 1846-1848, over 20,000 saints from the Church of Jesus Christ of Latter-day Saints left the United States, and headed to the west, seeking a place to worship their religion without persecution. In 1848, the saints entered the Salt Lake Valley which would become their new home. - 
  
  
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  Apr 12, 1861 – Apr 13, 1861
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  January 1, 1863
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  April 9, 1865
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        April 15, 1865, Petersen House, Washington, D.C. - 
  
  
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  February 24, 1868 to May 26, 1868
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  Pullman was in 1894.
Homestead was in 1892. - 
  
  Apr 21, 1898 – Dec 10, 1898
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        September 14, 1901 - 
  
  
        December 17, 1903