Westward Expansion 1865-1900 By toastytoaster Oct 31, 1864 Nevada Admitted to the Union Mar 1, 1867 Nebraska Admitted to the Union Aug 1, 1876 Colorado Admitted to the Union Nov 2, 1889 South Dakota Admitted to the Union Nov 2, 1889 North Dakota Admitted to the Union Nov 8, 1889 Montana Admitted to the Union Nov 11, 1889 Washington Admitted to the Union Jul 3, 1890 Idaho Admitted to the Union Jul 10, 1890 Wyoming Admitted to the Union Jan 4, 1896 Utah Admitted to the Union
