1850 California admitted to the Union as 31st state. 1850 Utah Territory (Utah, Nevada-North of 36 degrees 30 min, Western Colorado and SouthWestern Wyoming) organized. 1850 New Mexico Territory (Western New Mexico, Arizona and Nevada-South of 36 degrees 30 min) organized. 1850 Texas borders finalized. Central Colorado and SouthCentral Wyoming added to the Utah Territory. Eastern New Mexico added to the New Mexico Territory. With an unorganized piece North of the Texas panhandle. ?added to Missouri Territory? 1853 Gadsden Purchase from Mexico (Southern Arizona and New Mexico), added to the New Mexico Territory. 1853 Washington Territory (Washington, Northern Idaho and NorthWest Montana) created from Oregon Territory. Remainder (Oregon, Southern Idaho and WestCentral Wyoming) as Oregon Territory. Vancouver Island in dispute with Great Britain until 1872. 1854 Missouri Territory (aka The Indian Country) reorganized into the Nebraska Territory (Nebraska, NorthEast/NorthCentral Colorado, majority of Wyoming, WestCentral So.Dakota, Western No.Dakota and majority of Montana) and the Kansas Territory (Kansas and Central/Eastern Colorado). With an unorganized "public land strip" (Oklahoma panhandle). 1858 Minnesota admitted to the Union as 32nd state. Minnesota Territory reorganized, consists of Central/East No.Dakota and So.Dakota. 1859 Oregon admitted to the Union as 33rd state. Remainder of Oregon Territory (Southern Idaho and WestCentral Wyoming) added to the Washington Territory.
12/1998 M.A.Leonard, Last Update-01/2002