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Period: to
Westward Expansion
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The Louisiana Purchase
The Louisiana Purchase was the acquisition by the United States of America in 1803 of 828,000 square miles of France's claim to the territory of Louisiana. -
British Cession (Treaty of 1818)
A treaty signed in 1818 between the United States and the United Kingdom. It resolved standing boundary issues between the two nations, and allowed for joint occupation and settlement of the Oregon Country, known to the British and in Canadian history as the Columbia District of the Hudson's Bay Company, and including the southern portion of its sister district New Caledonia. -
Adams Onis Treaty
A treaty that settled a border dispute betwwen the United States and Spain and also gave the United States the Florida territory. -
Texas Annexation
The Texas annexation was the 1845 incorporation into the United States of America of the Republic of Texas, which was admitted to the Union as the 28th state. -
Oregon Territory
The Territory of Oregon was an organized incorporated territory of the United States that existed from August 14, 1848, until February 14, 1859, when the southwestern portion of the territory was admitted to the Union as the State of Oregon. -
Mexican Cession
The “Mexican Cession” refers to lands surrendered, or ceded, to the United States by Mexico at the end of the Mexican War. The terms of this transfer were spelled out in the Treaty of Guadalupe Hidalgo of 1848. -
GadsdenPurchase
a 29,640-square-mile (76,800 km2) region of present-day southern Arizona and southwestern New Mexico that was purchased by the United States in a treaty signed by James Gadsden.
