Mexican-American War

The Mexican-American War was an invasion of Mexico by the United States Army from 1846 to 1848, sparked by the disputed border between Texas and Mexico and the United States' desire to expand its territory. The war resulted in the U.S. capturing key Mexican territories, including California, Nevada, and Utah, and the signing of the 1848 Treaty of Guadalupe Hidalgo, which ended the war and recognized the U.S. annexation of these territories. The war drew criticism for its high casualties and cost, and intensified the debate over slavery in the United States.learn more on wikipedia