4 Mar 1801—4 Mar 1809: Jefferson/Burr and Clinton admin
3
1803
30 Apr 1803—30 Apr 1803: Louisiana Purchase (Arkansas, part of Colorado, Iowa, Louisiana, part of Minnesota, Missouri, part of Montana, part of North Dakota, part of Oklahoma, South Dakota and part of Wyoming
4
1809
4 Mar 1809—4 Mar 1817: Madison/Clinton and Gerry admin