In 1854, the United States acquired land from Mexico through the Gadsden Purchase. This land become into two future US states Arizona and New Mexico.
Step-by-step explanation:
The Mexican-American battle ended in 1848 with the Guadalupe Hidalgo Treaty. The main reason for this was the U.S. government wanted to expand its territory.
But the tension among the U.S. government and the Mexican government continued for the next six years.Thus the Gadsden Purchase finalized the tensions and an agreement was made between two governments in 1854.
The U.S. agreed to settle Mexico $10 million per 29,670 square mile part of Mexico. That became part of New Mexico and Arizona. Also, Gadsden’s Purchase granted the land requirement for the southern transcontinental railroad construction.