During the
Mexican-American War, Scott commanded the southern of the two United States armies (
Zachary Taylor commanded the northern army). In this campaign, Scott displayed a U.S. military doctrine that would be used in every subsequent war: to get on the enemy's flanks by using seapower. Landing at
Veracruz, Scott, assisted by his colonel of engineers,
Robert E. Lee, and perhaps inspired by
William H. Prescott's
History of the Conquest of Mexico, followed the approximate route taken by
Hernán Cortés in 1519 and assaulted
Mexico City. Scott's opponent in this campaign was Mexican president and general
Antonio López de Santa Anna. Despite high heat, rains, and difficult terrain, Scott won the battles of
Cerro Gordo,
Contreras/Padierna,
Churubusco, and
Molino del Rey, then assaulted the fort of
Chapultepec on
September 13,
1847, after which the city surrendered. When a large number of men from the Mexican
Saint Patrick's Battalion were captured during Churubusco, Scott gave orders for them to be hanged en masse during the battle of Chapultepec, specifying that the moment of execution should occur just after the U.S. flag was raised atop the Mexican citadel. This was a smudge on Scott's record, as the incident broke numerous
Articles of War.
As military commander of Mexico City, he was held in high esteem by Mexican civil and American authorities alike. However, Scott's vanity, as well as his corpulence, led to a catch phrase that was to haunt him for the remainder of his political life. Complaining about the division of command between himself and General Taylor, in a letter written to
Secretary of War William Marcy, Scott stated he had just risen from "at about 6 PM as I sat down to take a hasty plate of soup". The Polk administration, wishing to sabotage Scott's reputation, promptly published the letter, and the phrase appeared in political cartoons and folk songs for the rest of his life.
Another example of Scott's vanity was his reaction to losing at chess to a young New Orleans lad named
Paul Morphy in 1846. Scott did not take his defeat by the eight-year-old
chess prodigy gracefully.