-
Period: to
Westward Expansion
-
Louisiana Purchase
During Thomas Jefferson's presidency, the United States purchased approximately 828,000,000 square miles of territory from France. -
British Cession
During Monroe's first term, Britain and the U.S. signed a treaty that established boundaries between the U.S. and Canadian territories at the 49th parallel. This treaty was known as The Treaty of 1818. -
Adams-Onis Treaty
A treaty between the United States and Spain in 1819 that gave West Florida to the U.S. and set a boundary between the U.S. and New Spain. -
Texas Annexation
In 1845, the Republic of Texas voluntarily asked to become a part of the United States, and the government of the United States agreed to annex the nation. -
Oregon Territory (British)
The Oregon Territory was a territory of the United States that existed from August 14, 1848, until February 14, 1859, when the southwestern part of the territory was admitted to the Union as the State of Oregon. -
Mexican Cession
Mexico ceded the region of the modern day southwestern United States in the Treaty of Guadalupe Hidalgo in 1848. -
Gadsden Purchase
Mexico was forced to abandon Texas and to cede to the United States the territory now including most of New Mexico, Arizona, California, Colorado, Utah and Nevada. The United States, in return, gave $15,000,000 and assumed responsibility for paying $3,000,000 in claims of American citizens against the Mexican Government.
