1824 Indian Territory (majority of Oklahoma) created from Arkansas Territory. Remaining Arkansas Territiory consists of Arkansas. 1825 Russia abandons claims to "The Oregon Country". 1834 Lands East of the Missouri River in the Missouri Territory are transfered to the Michigan Territory. (Central/East N.Dakota and S.Dakota, Iowa and Western half of Minnesota.) 1834 ?Indian Territory definitely set apart for Indians? 1836 Arkansas admitted to the Union as 25th state. 1836 Wisconsin Territory created from Michigan Territory. Includes Wisconsin, Eastern Minn., and the area "East of the Missouri River" (Central/East N.Dakota and S.Dakota, Iowa and Western half of Minnesota.) Remaining Michigan Territory consists of Lower and Upper Michigan. 1836 NorthWest corner of Missouri added. (From Michigan/Wisconsin Territory) 1836 "Republic of Texas" declaration of independance from Mexico. 1837 Michigan admitted to the Union as 26th state. 1838 Iowa Territory created from Wisconsin Territory. Consists of the area "East of the Missouri River" (Central/East N.Dakota and S.Dakota, Iowa and Western half of Minnesota.) Remaining Wisconsin Territory consists of Wisconsin and Eastern Minn. 1842 Northern borders of New Hampshire and Maine are set by treaty with Great Britain. 1845 Florida admitted to the Union as 27th state. 1845 Texas annexed to the Union as 28th state. Most of area in dispute with Mexico until 1848. 1846 Southern boundry of Texas set at the Rio Grande (Rio Bravo) River. In dispute with Mexico until 1848. 1846 Iowa admitted to the Union as 29th state. 1846 Lands ceded to the District of Columbia (Federal) by Virginia (in 1791) are returned. 1846 Treaty with Great Britain sets the Northern boundry of "The Oregon Country" at 49 degrees North. Great Britain relinquish's claims to "The Oregon Country". Vancouver Island in dispute until 1872. 1848 Treaty with Mexico setting Southern boundry of Texas at the Rio Grande River. Treaty also transfers lands North of the Gila River (Ariz.) to the U.S. consisting of California, Nevada, Utah, Western Colorado and New Mexico. Central Colorado and Eastern New Mexico are claimed by Texas. 1848 "The Oregon Country" organized as the Oregon Territory. 1848 Wisconsin admitted to the Union as 30th state. 1849 Remainder of Wisconsin Territory (Eastern Minn.) and remainder of the Iowa Territory (Central/East N.Dakota and S.Dakota, and Western half of Minnesota) are reorganized as the Minnesota Territory.
12/1998 M.A.Leonard, Last Update-01/2002