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Louisiana Purchase
The Louisiana Purchase Treaty was signed by Robert Livingston and James Monroe, which doubled the size of the United States. -
Florida Acquisition
The Adam-Onis Treaty (more commonly know as the Forida Territory) was signed. -
Texas Annexation
The Treaties of Veasco were signed by Antonio López de Santa Anna of Mexico and Interim President David G. Burnet for Texas after the Battle of San Jacinto. -
Oregon Territory
The treaty was signed by Great Britain and the United States after about 28 years of sharing the land. -
Mexican Cession
The Treaty of Guadalupe Hidalgo was signed, which ended the two year long Mexican-American War. -
Gadsen Purchase
The treaty was signed by James Gadsen, the United States Ambassador for Mexico.
