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Louisiana Purchase
The Territory of Louisiana was continuously ceded between France and Spain, then the US decided to stop the feud and was able to purchase the territory for a bargain. -
British Cession
The Treaty of 1818 ended a dispute between the US, Britain, and Ireland. It also gave the US a lot of rights. -
Adams-Onis Treaty
The Adams-Onis Treaty was a treaty that gave the US Florida and settled the dispute between the two countries. -
Texas Annexation
The Texas Annexation was a territory that was added to the Union as the 28th State. -
Mexican Cession
The Mexican Cession was a treaty between the US and Mexico and the US bought the land off of Mexico for $15 million. -
Gadsden Purchase
The Gadsden Purchase was a treaty on where the US paid Mexico $10 million for an area that would later become part of Arizona and New Mexico. -
Oregon Territory
The Oregon Territory was an organized independent territory that lasted from August 14 1858 to February 14 1859. That is when the Oregon Territory joined the Union.
