1800-1876 By mordetwi Period: 1800 to 1876 1800-1876 Jun 15, 1800 The U.S. capital is moved from Philadelphia to Washington D.C. Nov 17, 1800 U.S. Congress meets in Washington D.C. for the first time Mar 4, 1801 Thomas Jefferson becomes president 1803 Marbury Vs. Madison: landmark Supreme Court decision 1803 Louisiana Purchase: treaty signed 1804 Lewis and Clark exploration of the Northwest 1805 Jefferson's second inauguration 1809 James Madison becomes president 1812 War of 1812 1813 Madison's second inauguration 1814 Treaty of Ghent ends war with Britain 1814 British capture Washington D.C. 1817 James Monroe becomes president 1819 Spain cedes Florida to the U.S. 1820 Missouri Comprise attempts to resolve slavery tensions 1821 Monroe's second inauguration 1823 Monroe Doctrine: Warning message to European nations 1825 John Quincy Adams becomes president 1828 Construction of the Baltimore-Ohio Railroad 1829 Andrew Jackson becomes president 1830 The Indian Removal Act is signed 1833 Jackson's second inauguration 1836 Siege of the Alamo 1837 Martin Van Buren becomes president 1841 William Henry Harrison becomes president 1841 Harrison dies only a month later, vice president John Tyler replacing him 1845 U.S. annexes Texas 1845 James Polk becomes president 1846 Mexican War: U.S. declares war on Mexico 1849 Zachary Taylor becomes president 1849 Harriet Tubman leads escaped slaves along the Underground Railway