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Louisiana Purchase
Thomas Jefferson bought the Louisiana Territory from Napolean Bonaparte for 15 million dollars. The U.S acquired 827,000 square miles. Lewis and Clark explored and navigated throughout this territory with the help of Sacajawea -
Adams-onis Treaty
Spain ceded Florida to the United States and defined the boundary between the U.S and New Spain, which was everything west of the Rocky Mountains. -
Remember the Alamo
A battle cry in the Texan's struggle for independence from Mexico, recalling the desperate fight of the Texan defenders in the Alamo, where they died to the last man -
Webster-Ashburton Treaty
Resolved several border issues between the United States and British North American Colonies. Ended the Aroostook War, which was a nonviolent dispute over the location of the Maine-New Brunswick border -
Texas Annexation
Incorporation of the Republic of Texas into the United States of America, which was admitted to the union as the 28th state. -
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War with Mexico
War between America and Mexico that was caused by dispute over land, mainly Texas. -
Oregon Territory
Land claimed by both the United States and Great Britain. The fifty four forty was the parallel that the U.S claimed up to. "Fifty four forty or fight" refers to the campaign slogan James K. Polk used that won him the election. -
Mexican Cession
In 1848, the Treaty of Guadalupe was signed establishing the Rio Grande and not the Nueces river as the U.S Mexican border. Mexico also recognized the U.S annexation of Texas and agreed to sell California and the rest of its territory north of the Rio Grande for 15 million dollars. -
Gadsden Purchase
U.S paid Mexico 10 million dollars for a 29,670 square mile portion of Mexico that later became part of Arizona and Mexico.