1800s By dgcmarzan Apr 30, 1803 Louisiana Purchase Feb 22, 1819 Purchase of Florida Dec 29, 1845 Annexation of Texas Period: Apr 25, 1846 to Feb 2, 1848 Mexcian-American War Jun 18, 1846 Oregon Territory Period: Jan 24, 1848 to Jan 1, 1855 Californnian Gold Rush Feb 2, 1848 Mexican Cession Feb 2, 1848 Treaty of Guadalupe Hidalgo Jun 24, 1853 Gadsden Purchase
