United States History 1788 - 1816 By ColinCK Sep 17, 1788 Constitution is ratified Feb 4, 1789 George Washington was elected the first president Jul 11, 1791 The Whiskey Rebellion Dec 15, 1791 Bill of right ratified Dec 8, 1793 Eli Whitney invents the cotton gin Dec 7, 1796 John Adams is elected president Feb 17, 1801 Thomas Jefferson is elected president president Apr 30, 1803 The purchase of the Louisiana Territory May 21, 1804 Lewis and Clark expedition Dec 22, 1807 The Embargo Act Jun 18, 1812 The War of 1812 begins