The Battle of Chapultepec, in September 1847, was a United States victory over Mexican forces holding Chapultepec Castle west of Mexico City during the Mexican-American War.
On Septermber 8, 1847, in the costly Battle of Molino del Rey, U.S. forces had managed to drive the Mexicans from their positions near the base of Chapultepec Castle guarding Mexico City from the west.
The city was yet to be taken, Santa Anna had 5,000 troops in the Ciudadela and 7,000 in other parts of the city. Yet, six of his generals were taken prisoner. At 1 AM the next day, he ordered a withdrawal to Guadalupe Hidalgo while the city authorities appeared at Scott's headquarters at 4 AM. By 7 AM the American flag was flying over the Ciudadela.
The cache can be found at N34 31.x78 w84 05.330
X= General Bravo surrendered to the New York Regiment on this hour