The Battle of Buena Vista, known as the Battle of La Angostura in Mexico, and sometimes as Battle of Buena Vista/La Angostura, was a battle of the Mexican–American War. It was fought between US forces, largely volunteers, under General Zachary Taylor, and the much larger Mexican Army under General Antonio López de Santa Anna. It took place near Buena Vista, a village in the state of Coahuila, about 12 km (7.5 mi) south of Saltillo, Mexico. La Angostura was the local name for the site. The outcome of the battle was ambiguous, with both sides claiming victory. Santa Anna's forces withdrew with war trophies of cannons and flags and left the field to the surprised U.S. forces, who had expected there to be another day of hard fighting.

Zachary Taylor was an American military leader who served as the 12th president of the United States from 1849 until his death in 1850. Taylor was a career officer in the United States Army, rising to the rank of major general and becoming a national hero for his victories in the Mexican–American War. As a result, he won election to the White House despite his vague political beliefs. His top priority as president was to preserve the Union. He died 16 months into his term from a stomach disease.