| AFTER ACTION REPORT | A1
by E.R. Bickford
Lise’ Patterson & Chris Dickson
© 2013 Decision Games
Bakersfi eld, CA.
Pedregal: Santa Anna at Bay
Torrejon’s Cavalry, with the Army of
the North in defensive positions to his
immediate north. The rest of the Army
of the East is deployed in the village of
Coyoacan, and Santa Anna’s HQ is in
San Angel, with the Army of the South.
The US player must eliminate all of
the Mexican Army for victory. The
Mexican player will try to prevent
this and to keep the US south of the
Rio Churubusco. Ideally, the Mexican
player would like to capture Gen.
Scott’s supply source at San Augustin.
The center of the map is domi-
nated by the Pedregal and the volcano
Zacatepec. The volcano is impassable
and the lava beds are impassable to
the Mexican forces. The US player
can traverse the beds with diffi culty.
Additionally, Gen. Scott has three engi-
neer leaders: Mason, Lee (Capt. Robert
AAR of Pedregal:
Santa Anna at Bay
It is 19 August 1847. Gen. Winfi eld
Scott has the US Army positioned
to the south of the lava bed known
as the Pedregal. His plan is to break
through the Mexican Army’s position
to the capital. Scott has a supply
source based in San Augustin where
he has the 3rd Division and the
Volunteers bivouacked. Meanwhile
the 1st Division, led by Gen. Worth,
is maneuvering along the Acapulco
Road around the eastern side of
the Pedregal. This advance is into
Bravo’s Army of the Centre, which
is in an improved position.
Meanwhile, Gen. Twiggs has the
2nd Division marching west along
the trail between San Augustin and
Padierna. Waiting there is Gen.
A2 | AFTER ACTION REPORT |
Pedregal: Santa Anna at Bay
E. Lee) and Beau (P.G.T. Beauregard).
With the aid of these engineers the
US Army increase the likelihood of
successful maneuver through the lava
beds. They are also useful in charg-
ing protected hexes and improving
the efficiency of trail movement.
Turn 1: 19 August
1847, 12:00 noon
The US player has the initiative
and is the first player. Gen. Worth
marches with the US 1st Division into
contact with the Mexican Army of the
Centre. Col. Garland’s Brigade has
the left and Clarke’s Brigade has the
center. The 1st Dragoons is deployed
on the right flank. Worth attacks the
Mexican forces in San Antonio. The
Mexican infantry is routed and the
village is captured by the US forces.
| AFTER ACTION REPORT | A3
On the other side of the battlefield,
Gen. Twiggs and the US 2nd Division
encounter a Mexican cavalry screen
south of Padierna. The US player
attacks the enemy and manages to
disrupt the Guanajuato Activos.
Gen. Pillow and the US 3rd Division
march out of San Augustin along
the Acapulco Road. These are out of
enemy contact though. Gen. Scott’s
opening has managed to dislodge the
Army of the Centre at San Antonio.
During the Mexican turn, the player
attempts to activate Santa Anna and
his headquarters. He needs a die roll
of one. This fails. Santa Anna and
the Army of the South remain quiet
in San Angel. Meanwhile Rangel’s
Brigade marches from the village
of Coyoacan toward the bastion at
San Mateo. Due to its low movement
rate, it doesn’t quite get there.
Turn 2: 19 August 1847, 1:30 PM
Back at San Antonio, Garland’s Brigade
leads an attack against the Mexican
position. The Mexican infantry bat-
talion is eliminated. Another battle
erupts at Padierna. The Mexican 2nd
Cavalry is defending in the village
against Gen. Twiggs’ Division. Another
of Santa Anna’s cavalry is eliminated.
Gen. Bravos attempts a counterattack
at the position near San Antonio. This
fails and the US 1st Division breaks
through. Meanwhile, the Mexican
forces occupy the bastion at San Mateo.
Then the Morelia and San Blas’s troops
head toward the village of Churubusco.
A defensive position needs to be built
up on the eastern flank. The village and
bastion will have to be strong points.
Turn 3: 19 August 1847, 3:00 PM
Gen. Worth has the 1st Division launch
an attack against Gen. Anaya’s 6th
Brigade. The Mexican forces become
disrupted and are forced to retreat near
the edge of the marshes. Beau works on
bringing a unit through the lava on the
western side of the field. This outflanks
the Mexican position at Padierna.
The Mexicans try to regroup. Gen.
Bravo’s position is paralyzed near San
Antonio. His troops are unable to flee
from contact with Worth’s Division.
(The Mexican troops have compara-
tively low movement allowances.)
Turn 4: 19 August 1847, 4:30 PM
The US player wants to capture San
Antonio. Col. Garland’s Brigade
resumes its attack against the Army of
A4 | AFTER ACTION REPORT |
Pedregal: Santa Anna at Bay
the Centre’s artillery battery, which is
limbered and finally retreated. Clarke’s
Brigade assaults Bravo’s Independents
and these suffer some casualties, but
remain stalwart in their defense along
the marshes. Pillow’s Division runs
through San Antonio and straight into
Bravo’s center, which is defended by the
National Guards. This formation routs
under fire. On the other side of the field,
the engineers work a path through
the lava to circumvent the ravine.
The Mexican player needs to relieve
the beleaguered units in the face of
Pillow’s attack so Gen. Perez’s Brigade
advances on the US 1st and 3rd Infantry
Divisions. The attack of the 4th Light
and 11th Line allows the artillery bat-
tery to escape and the hole in the center
is plugged by the 1st and 2nd Light.
On the other side, the Celaya Battery
fires on the US troops which have
| AFTER ACTION REPORT | A5
crossed the ravine. This is ineffective
and Smith’s Brigade is unharmed.
Turn 5: 19 August 1847, 6:00 PM
Just north of San Antonio, the US Army
resumes its attack on Gen. Lombardini
and the Army of the East. Worth’s 1st
Division is split holding both flanks
while Pillow’s Division has the center.
The 4th Light and 11th Line Infantry
units are pushed back by Garland’s
Brigade with artillery support. Then
in the center, Caldwalader’s Brigade
and Magruder’s Battery strike, and the
1st and 3rd Light Infantry are routed.
Near Padierna, the US forces led
by Gen. Twiggs have bogged down.
Nonetheless, the Mexican 7th Cavalry
is forced to retreat under fire from
Smith’s Brigade. Gen. Shields leads the
Volunteer Division from San Augustin
toward the fighting along the ravine.
A6 | AFTER ACTION REPORT |
Pedregal: Santa Anna at Bay
The Mexican player decides to launch
a counterattack against Smith’s
Brigade which has a foothold on the
hills near Padierna. Gen. Valencia
coordinates the attack and as a result,
the US troops fall back in retreat. (To
do this, they passed a morale check.)
Then Santa Anna sends part of Gen.
Canalizo’s Cavalry Brigade to the east
of Coyoacan, to prepare for a charge
against Worth’s advance infantry.
Turn 6: 19 August 1847, 7:30 PM
It is now twilight. This has several
effects that will slow down the attack.
First, the line of sight is reduced
to one hex. This makes artillery
less useful and hidden movement
more effective. Also the morale
checks are more difficult to pass.
Undeterred by the descending dark-
ness, US Generals Worth and Pillow
decide to press their attacks. These go
well and the Mexican units are routed.
The Victoria and Hidalgo battalions
retreat towards the Rio Churubusco,
as does the Independent battalion.
In the fighting across the ravine near
Padierna, Smith and Riley’s Brigades
force the 3rd and 8th Cavalry to retreat.
In the meantime, Gen. Shields and
the Volunteer division advances
toward Padierna along the trail.
The Mexican forces focus on recovery
and removing their disruptions,
rather than launching any preemp-
tive attacks or counterattacks. The
position near the bastion at Ansaldo is
holding up better than the area on the
opposite side, near the Churubusco.
Turn 7: Night of 19-20
Both sides focus primarily on
repositioning. This is the time for
the Mexican troops to escape
enemy ZOC. There is no fighting.
Turn 8: 20 August 1847, 6:00 AM
Turn eight is a twilight turn as it occurs
during the dawn hours. On the western
side of the battlefield, Gen. Shields
orders the Volunteers to attack the
Activos. The Mexican Brigade falls back
and the 2nd Pennsylvania Regiment
advances along the trail. Unfortunately,
Gen. Shields is killed in the fighting.
Over near Ansaldo, Pillow and Worth
resume their attacks on the position
of the Army of the East. The Mexican
Independent Brigade is defending
along the Acapulco Road. It is hit
| AFTER ACTION REPORT | A7
full strength by Pillow’s 3rd Division
and routs across the Churubusco
River. Worth also attacks and Col.
Clarke’s Brigade drives the 4th Light
backwards. Meanwhile, Garland’s
Brigade and the 3rd Dragoons
hold Canalizo’s cavalry at bay.
During the Mexican player’s turn, the
4th Light and 11th Line launch a coun-
terattack against the US 1st Division.
This is repulsed and the Mexican
units fall back in retreat. The Canalizo
Cavalry Brigade also flees to the rear.
On the western side of the map, the
Activos also attempt a counterattack
against the 2nd Pennsylvania. The US
infantry regiment is on the tra