Battle of Buena Vista Begins in Mexican-American War

Context

The Mexican-American War had entered its second year by early 1847, following the U.S. annexation of Texas and disputes over the border. American strategy included a northern thrust under Zachary Taylor, who had captured Monterrey the previous September and advanced toward Saltillo in Coahuila. This left Taylor with a reduced force after many regular troops were redirected for an amphibious landing at Veracruz under Winfield Scott.

What Happened

Santa Anna assembled roughly 15,000 men at San Luis Potosí and marched north through difficult conditions to confront the Americans. On February 22, his army reached the narrow Angostura Pass near the Buena Vista hacienda, where Taylor’s approximately 5,000 troops, including volunteers and artillery under John E. Wool, had taken position. Santa Anna sent a surrender demand, which Taylor rejected. Artillery duels and infantry probes began that afternoon amid the broken ground and ravines.

Aftermath

Fighting intensified on February 23 with Mexican cavalry and infantry charges against the American left flank. U.S. artillery batteries, supported by stands from units such as the Mississippi Rifles, inflicted heavy casualties and checked the advances. By evening Santa Anna’s forces began a nighttime withdrawal, leaving the field to Taylor’s command. Both sides suffered significant losses, though estimates vary.

Legacy

The battle enhanced Taylor’s reputation as a capable commander, helping propel him to the presidency in 1848. It demonstrated the effectiveness of American artillery and defensive tactics against superior numbers in challenging terrain. The engagement formed part of the broader U.S. campaign that led to the Mexican Cession, adding vast territories to the United States through the Treaty of Guadalupe Hidalgo.