President Jefferson would like to buy the port of New Orleans.
Mexican Cession (1848)
It was an act by congress. It allowed people to get free land in the West. They had to live there for 5 years and to do something with the land. They usually gave around 160 acres of free land.
Oregon Territory (1846)
Jefferson wanted to buy port of New Orleans. France needed money so they sold the whole territory for $15 million. Purchased the territory through a treaty. Doubled size of U.S.
Texas Annexation (1845)
Peace treaty Guadalupe-Hidalgo officially ended the Mexican War. The core of the treaty defined the "Mexican Cession". They ceded upper California and new Mexico.
Transcontinental Railroad/ Gadsden Purchase
The territory was divided between the U.S. and Britain. The Oregon boundary dispute between the U.S. and Britain was settled by signing the Oregon Treaty.
The Texas Annexation was the 1845 annexation of the Republic of Texas into the U.S. Texas was annexed into the U.S. because they were scared Mexico would want their land back.
The Gadsden Purchase included lands south of the Gila River and west of the Rio Grande where the U.S. wanted to build the Transcontinental Railroad. The railroad was used to revolutionize transport in the U.S.