Mexico City Campaign

The American assault on Chapultepec Castle.

Date	September 8–15 1847
Location	Mexico City, D.F.
Result	Decisive United States victory

Belligerents

United States

Mexico

Commanders and leaders

Winfield Scott

Antonio López de Santa Anna

Strength

7,157

16,000

Casualties and losses

~1,651 killed or wounded

~2,323 killed or wounded,
~3,000 captured

The Battle for Mexico City refers to the series of engagements from September 8 to September 15, 1847, in the general vicinity of Mexico City during the Mexican-American War. Included are major actions at the battles of Molino del Rey and Chapultepec, culminating with the fall of Mexico City. The U.S. Army under Winfield Scott scored a major success that ended the war.

The major objective of American operations in central Mexico had been the capture of Mexico City. After capturing the port of Veracruz in March, General Winfield Scott was able to secure a base and move inland and defeat a large Mexican force at the Battle of Cerro Gordo. After routing the Mexicans at the Battle of Churubusco, Scott's army was only five miles (8 km) away from its objective of Mexico City.

Although defeated at Cerro Gordo and Churubusco, General Santa Anna's army remained intact and outnumbered Scott.

On September 8, the fight for Mexico City began. Scott believed that a cannon foundry was located at the Molino del Rey, the King's Mill, located just over 2 miles (3 km) outside the city. Scott sent the 1st Division under William J. Worth to seize and destroy the foundry. Worth wished to include Chapultepec Castle in his attack, and when Scott refused, a bitter rivalry began between Scott and Worth. In the ensuing battle, both sides suffered heavy casualties, and Worth drove the Mexicans from the mill, separating them from the forces at Chapultepec. The battle produced no significant military gains for the U.S.

The main assault on the city came a few days later on September 12. Mexico City was guarded in part by Chapultepec Castle, which was being used as a military academy. Scott preceded infantry assault with an all day artillery barrage on September 12. The next day, September 13, the 4th Division, under John A. Quitman, spearheaded the attack against Chapultepec and carried the castle. Future Confederate generals George E. Pickett and James Longstreet participated in the attack. Serving in the Mexican defense were the cadets later immortalized as Los Niños Héroes (the "Boy Heroes"). The Mexican forces fell back from Chapultepec and retreated within the city.

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