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Louisiana Purchase
The Louisiana Purchase was a land deal between the United States and France, in which the U.S. acquired approximately 827,000 square miles of land west of the Mississippi River for $15 million. -
Treaty of 49th Parallel
American Convention of 1818, Convention of 1818, or simply the Treaty of 1818, was an international treaty signed in 1818 between the United States and the United Kingdom. -
Florida Treaty
The Florida Treaty was signed in Washington on February 22, 1819 and ratified by Spain October 24, 1820 -
Webster Ashburton Treaty
Treaty resolving several border issues between the United States and the British North American colonies. Signed under John Tyler's presidency, it resolved the Aroostook War, a nonviolent dispute over the location of the Maine–New Brunswick border. -
Texas Annexation
The Texas annexation was the 1845 incorporation of the Republic of Texas into the United States of America, which was admitted to the Union as the 28th state. -
Oregon Treaty
The Oregon Treaty is a treaty between the United Kingdom and the United States that was signed on June 15, 1846, in Washington, D.C. Signed under the presidency of James K. Polk, the treaty brought an end to the Oregon boundary dispute by settling competing American and British claims to the Oregon.