Result of Annexation:
* Texas became the 28th state of the United States.
* The annexation of Texas led to the Mexican-American War (1846-1848).
* The Mexican-American War resulted in the United States acquiring a vast territory in the Southwest, including present-day California, Nevada, Utah, Arizona, and New Mexico.
* The annexation of Texas also contributed to the growing debate over slavery in the United States. Texas was a slave state, and its annexation added more slave territory to the Union. This led to increased tensions between the North and the South, which eventually erupted into the Civil War (1861-1865).
