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The Louisiana Purchase
Thomas Jefferson purchased this territory from France, for 15 million, at about 4 cents per acre. -
Florida Cession
Floirda was ceded by Spain to the US in 1819, and was goverened for a short period of time by Andrew Jackson. -
Texas Annexation
Texas was annexed after the mexican-american war, under the presidency of James K. Polk. -
Mexican Cession
Mexico ceded a large territory to the US after the treaty of guadalupe-Hidalgo, which also recognized Texas as a state. -
Oregon Territory
The territory of Oregon was acquired in around 1846-1848, and then the southwestern portion was split into the Union as the state of Oregon. -
Gadsden Purchase
The Gadsden Purchase settled the dispute over the exact location of the Mexican border, and added a small territory to the US.
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