Manifest Destiny By Bladesmasher2 Sep 22, 1783 United States Apr 30, 1803 Louisana Purchase Bought From France Oct 27, 1810 West Florida Annixation Oct 27, 1813 West Florida Annixation Apr 26, 1818 Red River Cession With Great Britian Oct 27, 1819 East Florida Annixation ceded spain Aug 9, 1842 Webster-Ashburton Treaty Border Adjustment with Great Britian Dec 29, 1845 Texas Annixation Jun 18, 1846 Oregon Territory Ceded by Great Britian Feb 2, 1848 Mexican Cession Treaty Of Guadalupe Hildago Dec 30, 1853 Gadsden Purchase Bought From Mexico