US Genealogy Map Project
Image provided by "Graphic Maps"
Image provided by "Graphic Maps"
.... Part of "The Oregon Country", claimed by multiple nations (France,
Spain, Russia, Great Britain and the U.S.).
France relinquished claims in 1803 ?with sale of Louisiana Territory?
1818 Joint claim with Great Britain sets "The Oregon Country" as
being between 42 degrees North to 54 degrees 40 minutes North with the
Eastern boundry as the Continental Divide.
1819 Treaty with Spain sets the Northern border of Spanish claims
at 42 degrees North. Relinquishing claims to "The Oregon Country".
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".
1848 "The Oregon Country" organized as the Oregon Territory.
1853 Washington Territory (Washington, Northern Idaho and NorthWest
Montana) created from Oregon Territory. Oregon Territory reorganized
(Oregon, Southern Idaho and WestCentral Wyoming).
1859 Oregon Territory dissolved, remainder (Southern Idaho and WestCentral Wyoming)
added to the Washington Territory.
1863 Idaho Territory (Idaho, Western Montana and WestCentral Wyoming) created from
the Washington Territory.
1863 Dakota Territory reorganized, North half of Wyoming and majority of Montana
added to the Idaho Territory.
1864 Montana Territory (Montana) created from Idaho Territory.
Idaho Territory reorganized (Idaho and North half of Wyoming).
1867 Nebraska Territory dissolved, South half of Wyoming added to the Idaho Territory.
1868 Idaho Territory reorganized into the Wyoming Territory (Wyoming)
and the Idaho Territory (Idaho).
1890 Idaho admitted to the Union as 43rd State.
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12/1998 M.A.Leonard, Last Update-01/02/2006