U.S. History A Timeline By USTimelines Oct 12, 1492 The Discovery of America by Columbus May 14, 1607 The Settlement of Jamestown 1754 The French and Indian War Dec 16, 1773 The Boston Tea Party Apr 19, 1775 The Battle of Lexington and Concord Jul 4, 1776 The Declaration of Independence Sep 28, 1781 The Battle of Yorktown May 25, 1787 The Constitutional Convention 1794 The invention of the cotton gin 1798 The Alien and Sedition Acts 1803 The Louisiana Purchase Jun 18, 1812 The War of 1812 1820 The Missouri Compromise Oct 31, 1828 Andrew Jackson’s Election 1830 The Trail of Tears 1837 The invention of the telegraph May 10, 1837 The Panic of 1837 1846 The Mexican-American War 1850 The Compromise of 1850 Apr 12, 1861 The Firing on Fort Sumter Jan 1, 1863 The Emancipation Proclamation 1865 13th, 14th, 15th Amendments Apr 9, 1865 Surrender at Appomattox Courthouse Apr 15, 1865 Abraham Lincoln’s Assassination Feb 24, 1868 Andrew Johnson’s Impeachment Jan 2, 1882 The Organization of Standard Oil Trust Jul 1, 1892 The Pullman and Homestead Strikes Apr 21, 1898 The Spanish-American War 1901 Theodore Roosevelt becomes president Dec 17, 1903 The invention of the electric light, telephone, and airplane Date based on when the airplane was invented, the others were invented some time before.