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Period: to
Westward Expansion
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Louisiana Purchase
President Thomas Jefferson bought it from France for 3 cents an acre -
Purchase of Florida
The Adams-onis Treaty admitted Florida to the United States -
British Cession
On April 4, 1842, British diplomat Lord Ashburton arrived in Washington at the head of a special mission to the United States. The first order of business was settling the border between the United States and Canada. -
Annexation of Texas
Texas Republic's president formally transferred power to the new governor of the U.S. state of Texas. -
Oregon Territory
The Senate ratified the treaty by a vote of 41-14 on June 18, 1846. A later controversy over the precise boundaries in the Juan de Fuca Strait was resolved by international arbitration in favor of the United States. -
Mexican Cession
The Mexican Cession consist of present day U.S. states of California, Nevada, Utah, most of Arizona, about half of New Mexico, about a quarter of Colorado, and a small section of Wyoming. -
Gadsden Purchase
United States agreed to pay Mexico $10 million for a 29,670 square mile portion of Mexico that later became part of Arizona and New Mexico.
