The tract of land the united states received at the end of the mexican-american war in 1848 was called the mexican cession. the republic of texas. the gadsden purchase. the louisiana purchase.

The correct answer is Mexican Cession.

After the US won the Mexican-American War, it gained significant territory known as the Mexican Cession. In the Treaty of Guadalupe Hidalgo, Mexico agreed to give over this land which includes modern day California, Arizona, New Mexico, Utah, and Colorado. This treaty greatly increased the size of the US and helped the US federal government to get close to achieve it's goal of manifest destiny.

answer; i believe the correct answer is (the willamete valley);