BACKGROUND
Following their defeats at Contreras Antonio de Padua María Severino López de Santa Anna y Pérez de Lebrón ordered Major General Nicolás Bravo Rueda with the Army of the Center to retreat from San Antonio to Churubusco.[1]:296 Santa Anna also ordered Major General Manuel Rincón to hold the Franciscan Convent of San Mateo in Churubusco, with earthworks and seven guns, and placed General Francisco Pérez on the tete-de-pont on the south bank of the river.[1]:296 Two regiments were placed along the river while the convent included the Bravo Battalions of the Mexico City National Guard and the San Patricio Battalion, plus Santa Anna formed a reserve along the highway to the north.[1]:296
Battle
sent David Twiggs and Gideon Johnson Pillow's Divisions from San Angel to Coyoacán, while he
ordered William
Jenkins Worth to turn the San Antonio position.[1]:296 Worth sent Colonel Newman S. Clarke's Brigade and
Lieutenant Colonel Charles Ferguson Smith's Light Battalion across the Pedregal lava field
to the west of
San Antonio, while Colonel John Garland faced San Antonio on the south.[1]:297
During retreat from San Antonio, the Mexican defenders (part of the 1st Line of Defense (or sometimes the
"Army of the Center") with Colonel F. Villarreal and about 2,000 men: 700 of the "Hidalgo,"
500 of the
"Victoria" (Lieutenant Colonel P. Jorrin) National Guards Battalions, and 800 others: under Colonels A.
Zerecero and J. G. Perdigón Garay), were struck in flank by Clarke's Brigade. Garland moved forward as the
Mexicans withdrew from San Antonio and captured a General and four guns.[1]:297
Scott ordered an attack on the convent.[1]:297 In addition to the stone walls of the
convent, the defenses
included a series of incomplete trenches the Mexicans had begun digging prior to the attack.[4] Some
elements of the Tlapa and Lagos Battalions arrived as reinforcements. Three cannon were
placed on the right;
two in the center; and the remaining two on the left. Independencia was assigned to defend the upper walls,
the right flank leading to the bridge, the unfortified south and north sides, and two adobe huts further
forward on the battlefield. The Bravos and the San Patricios were stationed on the left, behind barricades.
In support along the Rio Churubusco was the Pérez Brigade: 2,500 men (11th Line, 1st, 3d &
4th Light
Infantry Regiments).
Worth's division took on the tete-de-pont, while Twiggs' the convent.[1]:298 Rincón's gunners were able to
force Taylor's battery to withdraw,[1]:298 and Perez's defense on the tete-de-ponte twice
repulsed Major
Benjamin Louis Eulalie de Bonneville's 6th Infantry charge.[1]:298 The attack by Franklin Pierce and James
Shields, crossing the river on the Coyoacan-Mixcoac road in an attempt to cut off the
Mexican retreat, was
also stopped.[1]:298 However, Worth turned the Mexican left and crossed the river, while the 8th and 5th
Infantry took the tete de pont.[1]:300 Captain Duncan then set up a battery to attack the
convent.[1]:300
Two of the Mexican cannons had melted and a third had fallen from its mount. Lieutenant
Colonel Francisco
Peñúñuri of Independencia led a handful of men in a bayonet charge and was defeated. He and Captain Luis
Martínez de Castro, who had accompanied him, were killed in the battle. Officers from the Bravos attempted
to raise the white flag over the convent walls on three occasions.[1]:300 They were prevented from doing so,
however, by members of the San Patricios who feared the fate that awaited them if they were taken
prisoner.[5] They were ultimately captured and court-marshaled for desertion, including the
leader, John
Patrick Riley. U.S. Captain James Milton Smith finally stopped the fighting by putting up a white
handkerchief.[1]:300
Aftermath
The Americans captured 192 prisoners and three pieces of artillery at the tete de pont.[1]:300 They captured 1,259 prisoners, including three Generals and the San Patricios leader Lieutenant Colonel Francisco Rosenda Moreno, plus seven pieces of artillery at the convent.[1]:300 They captured another 380 prisoners further up the road.[1]:300 Seventy-two men of the San Patricios Battalion were court-marshaled by the United States Army as deserters. Two separate court-marshals were held, one at Tacubaya on 23 August, and another at San Ángel on 26 August. Fifty were sentenced to hang, having deserted after war had been declared. Those who had deserted earlier received 50 lashes. (See Saint Patrick's Battalion for a more complete description.) Scott did not continue the pursuit into Mexico City, "...willing to leave something to this republic... I halted our victorious corps at the gates of the city."[1]:301 A Brigade of volunteers from New York was billeted to the convent, remaining there until September 7.

Battle of Churubusco, during the Mexican–American War, painting by Carl Nebel
Battle of Churubusco
Map of the battle of Churubusco