1826 ; Influence. ; Louisiana Purchase. ; Slavery ; United States ; Extension to the territories. ; Plantation owners ; Political activity ; United States ; History. ; Family farms ; United States ; History. ; Land settlement ; P-Jefferson, Thomas, ; 1743
1865. ; -1783. ; United States ; Politics and government ; 1783-Kennedy, Roger G. ; United States ; Territorial expansion. ; United States ; Politics and government ; 1775