The engagement did not last many minutes, but the killed and wounded were numerous for the number of troops engaged.
During the night of the 11th batteries were established which could play upon the fortifications of Chapultepec.

The bombardment commenced early on the morning of the 12th, but there was no further engagement during this day than that of the artillery.

General Scott assigned the capture of Chapultepec to General Pillow, but did not leave the details to his judgment.

Two assaulting columns, two hundred and fifty men each, composed of volunteers for the occasion, were formed.

They were commanded by Captains McKinzie and Casey respectively.