How did the United States add new territories in the West through victory in the Mexican-American war?

As a result of the Mexican-American War, the United States added new territories in the West. The Mexican-American War began when Mexico attacked troops from the United States military that were in the disputed land. The United States believed that the border between Mexico and Texas was at the Rio Grande River while Mexico felt it was at the Nueces River. American troops were in this disputed area, and Mexico attacked them, considering the presence...

As a result of the Mexican-American War, the United States added new territories in the West. The Mexican-American War began when Mexico attacked troops from the United States military that were in the disputed land. The United States believed that the border between Mexico and Texas was at the Rio Grande River while Mexico felt it was at the Nueces River. American troops were in this disputed area, and Mexico attacked them, considering the presence of these troops as an invasion of Mexican land.

The United States defeated Mexico in this war. As a result of the Treaty of Guadalupe Hidalgo, the United States gained much land from Mexico. The border with Texas was established at the Rio Grande River. The United States gained much land in the Southwest, including land in present-day states such as Arizona, California, Utah, Nevada, New Mexico, Wyoming, and Colorado. The United States paid Mexico $15 million for this land. The United States also agreed to settle all claims Americans had against the Mexican government.