1800-1810 By isaiahsmithfw Period: Jan 1, 1800 to Dec 31, 1810 1800-1810 Jan 10, 1800 The US Senate ratified a peace treaty with Tunis. June the capital was moved from Philadelphia to Washington D.C. Jun 9, 1800 the capital was moved from Philadelphia to Washington D.C. Mar 25, 1801 John Adam's Presidency term ended (1797-1801) Apr 25, 1801 Thomas Jefferson was elected president Apr 25, 1801 Population increase to 5.3 million (1 million African descent.) Mar 25, 1802 Ohio outlaws slavery in September Apr 25, 1803 January 18, Louisiana Purchase Jan 25, 1804 Thomas Jefferson was re-elected president Dec 25, 1805 The Lewis and clark expedition reached the Pacific ocean Mar 29, 1806 Thomas Jefferson signed into law a bill allocating funds for the building of the National Road Mar 25, 1807 The importation of slaves was prohibited by a law passed by the U.S. Congress, but the law would not take effect until the January 1, 1808. Jan 1, 1808 The law banning importation of slaves into United States took effect. Dec 25, 1809 The first book by Washington Irving, A History of New York, an inventive blend of history and satire Jun 23, 1810 John Jacob Astor formed the Pacific Fur Company.