1816. James Monroe elected President. Indiana admitted into the Union.
1817. Admission of Mississippi into the Union.
1818. Beginning of the Seminole War. Illinois admitted into the Union. Act passed establishing the flag of the United States. General Jackson captures Spanish fort, St. Mark’s, Florida.
1819. Treaty between the United States and Spain for the cession of Florida (formal possession given in 1821). Admission of Alabama into the Union.
1820. Admission of Maine into the Union. Adoption of the Missouri Compromise, 1820, 1821. James Monroe re-elected President.
1822. Establishment of the colony of Liberia. The President recommends recognition of the independence of the South American States and Mexico.
1823. The President announces the “Monroe Doctrine.”
1824. John Quincy Adams elected President.
1825. Corner-stone of Bunker Hill monument laid in presence of Lafayette.
1827. Parry’s expedition to the Arctic circle, latitude 82° 45´.