The Southwest region of the United States includes Arizona, New Mexico, Oklahoma, and Texas.
- When the United States was formed in 1776, the Southwest was not part of the country. The Southwest was added to the United States after the Mexican-American War of 1846-48.
- Shorty after the addition of the Southwest to the United States, the Civil War broke out. The Southwest region supported the Confederate States of America in its fight against the Union.
- There was a large population of Native Americans in this region. The largest tribes were the Apache, Navajo, and Ute. As the American settlers began to claim land in the region, the Native Americans were forced off of their lands and onto reservations.