The Mexican–American War, [a] also known in the United States as the Mexican War, and in Mexico as the United States intervention in Mexico, [b] (April 25, 1846 – February 2, 1848) was an invasion of Mexico by the United States Army.

Feb 13, 2025 · Mexican-American War, war between the U.S. and Mexico from 1846 to 1848. It was caused by a territorial dispute stemming from the United States’ annexation of Texas in 1845 and from contention over whether Texas ended at the Nueces River or the Rio Grande.

Nov 9, 2009 · The Mexican-American War was a 1846-1848 conflict over vast territories in the American West, which the Treaty of Guadalupe Hidalgo gave to the United States.

May 14, 2020 · When the Mexican military finally attacked Taylor’s army, war was declared, and Polk forced westward expansion through conflict with Mexico. Even though the war was opposed by many Americans, Americans rushed to volunteer and fight.

The Mexican-American War is one of the least known pivotal moments in US History. It paved the way for so many other important events, from the expansion and dispossession of indigenous people, the California Gold Rush, and American Civil War.

This is a list of the major causes and effects of the Mexican-American War, which grew from a border dispute after the United States annexed Texas in 1845 and resulted in the United States’ acquisition of more than 500,000 square miles (1,300,000 square kilometers) of Mexican territory.

This list presents some of the key facts of the Mexican-American War, from its origins following the United States’ annexation of Texas (1845) to major turning points in the conflict, including the Battle of Buena Vista in February 1847 and the capture of …

The Mexican-American war (1846-1848) changed the slavery debate. It almost doubled the size of the United States and began a debate, between Northerners and Southerners, over what to do with the newly acquired land.

On May 13, 1846, the United States Congress declared war on Mexico after a request from President James K. Polk. Then, on May 26, 1848, both sides ratified the peace treaty that ended the conflict.

Tensions between the United States and Mexico rapidly deteriorated in the 1840s as American expansionists eagerly eyed Mexican land to the west, including the lush northern Mexican province of California.