he battle
before these troops arrived.

A sufficient guard having been left with the prisoners, General
Persifor F. Smith was ordered with his brigade, the Mounted Rifles and
Engineers, in pursuit of the fleeing enemy. They were attacked at San
Angel, but the attacking party were soon driven off. General Pillow
joined these forces at San Angel, and General Scott came up with them
at Coyoacan, where he had ordered the army to halt.

From this point in the direction of the capital, Churubusco was one
mile; two miles to the southeast was San Antonio. Churubusco is about
six miles south of the City of Mexico, on a river of the same name,
and on the road from San Angel and San Antonio from San Augustin.
General Scott on his arrival ordered Captain Lee, with Captain Phil
Kearney's company of the First Dragoons and a company of the Mounted
Rifles, to make a reconnoissance. In the meantime Pillow and
Cadwallader were to attack San Antonio in the rear, General Worth
assailing it in front. A reconnoissance having been made of the
convent of San Pablo, in the town of Churubusco, a brigade from
Twiggs's division, a part of Smith's brigade, Riley's brigade, and
Taylor's battery were ordered to attack. After the defeat of General
Valencia at Contreras, General Worth returned with Garland's brigade
in front of San Antonio. His orders were to attack as soon as Pillow
and Twiggs, moving from Contreras, approached in the rear. Worth
ordered Clarke's brigade to move over the _pedregal_ and turn the
right flank of the fortifications at San Antonio and cut the enemy's
line of communication. Henry Francis Clarke's brigade was attacked on
its march, but dispersed the attacking force, and soon encountered the
rear of the Mexicans from San Antonio and engaged them. Pillow with
Cadwallader's brigade, joined Worth in pursuit of the fleeing Mexican
troops and both attacked the _tete-de-pont_ in their front. Riley's
brigade having been ordered forward, General Scott ordered Pierce's
brigade to move by the road leading north from Coyoacan across the
Churubusco River by a bridge, turn to the right, and seize the
causeway in the rear of the _tete-de-pont_. General Scott, learning
that General Shields, in the rear of the Mexican lines, was in danger
of being cut off and captured, ordered Major E.V. Sumner with the
Mounted Rifles under Major W.W. Loring, and the Second Dragoons under
Captain Henry Hastings Sibley, to his support. The attack of the
Am