1867 Alaska purchased from Russia.
1867 Nebraska admitted to the Union as 37th state.
Remainder of territory (South half of Wyoming) added to the Idaho Territory.
1868 Idaho Territory reorganized into the Wyoming Territory (Wyoming)
and the Idaho Territory (Idaho).
1872 Treaty with Great Britain setting the "Strait of Juan De Fuca", South
of Vancouver Island, as the boundry.
1876 Colorado admitted to the Union as 38th state.
1889 North Dakota admitted to the Union as 39th state.
South Dakota admitted to the Union as 40th state.
Montana admitted to the Union as 41st state.
Washington admitted to the Union as 42nd state.
1890 Idaho admitted to the Union as 43rd state.
Wyoming admitted to the Union as 44th state.
1896 Utah admitted to the Union as 45th state.
1898 Hawaiian Islands acquired.
Acquired the Islands of Porto Rico, Guam, Midway and Wake.
Philippine Islands acquired.
1899 Samoa Islands acquired.
1900 Territory of Hawaii organized.
1907 Oklahoma admitted to the Union as 46th state.
1912 Territory of Alaska organized.
1912 New Mexico admitted to the Union as 47th state.
Arizona admitted to the Union as 48th state.
1917 Virgin Islands (Danish West Indies) acquired.
1959 Alaska admitted to the Union as 49th state.
Hawaii admitted to the Union as 50th state.

12/1998 M.A.Leonard, Last Update-01/2002