1861 Utah Territory reorganized into the Colorado Territory (West half of Colorado), the Utah Territory (Utah) and the Nevada Territory (Nevada-North of 36 degrees 30 min). SouthWest Wyoming added to the Nebraska Territory. 1861 Kansas admitted to the Union as 34th state. Remainder of Kansas Territory (Central/Eastern Colorado) added to the Colorado Territory. 1861 Nebraska Territory and remainder of Minnesota Territory reorganized into the Dakota Territory (So.Dakota, No.Dakota, North half of Wyoming, and majority of Montana) and the Nebraska Territory (Nebraska and South half of Wyoming). NorthEast/NorthCentral Colorado added to the Colorado Territory. Far SouthEast corner of Washington Territory (SouthCentral Wyoming) added to the Nebraska Territory. 1861 ?New Mexico Territory "piece" of Colorado added to the Colorado Territory? 1863 New Mexico Territory reorganized into the Arizona Territory (Arizona) and the New Mexico Territory (New Mexico). ?Nevada "piece" added to the Nevada Territory? 1863 Washington Territory reorganized into the Washington Territory (Washington) and the Idaho Territory (Idaho, Western Montana and WestCentral Wyoming). Vancouver Island in dispute with Great Britain until 1872. 1863 Dakota Territory reorganized, now consists of North and South Dakota, with the remainder (North half of Wyoming and majority of Montana) added to the Idaho Territory. 1863 West Virginia separates from Virginia, admitted to the Union as 35th state. 1864 Montana Territory (Montana) created from Idaho Territory. Remainder of Idaho Territory consists of Idaho and North half of Wyoming. 1864 Nevada admitted to the Union as 36th state.
12/1998 M.A.Leonard, Last Update-01/2002