File:United States 1817-12-1818-10.png

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DescriptionUnited States 1817-12-1818-10.png	Map of the states and territories of the United States as it was from December 1817 to October 1818. On December 10 1817, Mississippi Territory was admitted as the state of Mississippi. On October 20 1818, the Treaty of 1818 settled the northern border with the holdings of the United Kingdom, and granted joint custody of the Oregon Country to the United Kingdom and United States.
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Territorial evolution maps of the United States

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