history project By Chloe.Leichliter 1776 Decleration of Independence signed Period: 1776 to 1860 Timeline 1783 Treaty of Paris ends American Revolution 1787 Constitutional Convention held in Philadelphia 1789 George Washington becomes president 1803 Louisiana Purchase 1812 The war of 1812 1820 Missouri Compromise 1823 Monroe Doctrine established 1846 Mexican-American War 1860 Abraham Lincoln is elected