Manifest Destiny Timeline By dominick Period: Jan 1, 1800 to Dec 31, 1860 Manifest Destiny Timeline Apr 30, 1803 Louisiana Purchase Feb 22, 1819 Purchase of Florida Dec 29, 1845 Annexation of Texas Jun 18, 1846 Oregon Territory Feb 2, 1848 Mexican Cession (War with Mexico) Jun 24, 1853 Gadsden Purchase