Major Lally's March

Colonel Louis Wilson of North Carolina was preparing to lead a relief column of 1000 soldiers to General Scott, but he contracted yellow fever.  With Wilson incapacitated, the next ranking officer, Major Folliot Thornton Lally, took command.  The command was a hodgepodge of regiments: 2 companies of the 4th Infantry, 2 companies of the 5th Infantry, 1 company of the 11th Infantry, 3 companies of the 12th Infantry, 2 companies of the U. S. Voltigeurs, 1 company of the 2nd Artillery, 1 company of the Georgia Volunteers, and a company of Louisianna Mounted Volunteers.  Lally himself was from the 9th Infantry, which had departed with General Pierce more than three weeks earlier.

Paso de Ovejas

The column set out on August 6th.  The pace was slow and guerrillas were always nearby.  Stragglers were frequently captured or killed.  Many soldiers abandoned their knapsacks on the side of the road.  On the 10th, the column neared Paso de Ovejas when gunfire erupted.  Luckily, the enemy was out of range for small arms.  However, the front of the column was soon charged by light cavalry.  Cannons quickly broke their charge and sent them in flight.  Before Lally's forces could engage the men off the roadside, they had fled.  One American was killed.

National Bridge

On the 12th of August, the column arrived at the National Bridge, an impressive structure that spanned a ravine.  When General Scott's Army came to the bridge in April, it was abandoned.  When General Pierce came to the bridge in July, a minor skirmish ensued before the guerrillas retreated.  For Major Lally, National Bridge proved to be a fight.  The guerrillas were dug in and ready to repel the Americans.  Thinking to dislodge them with cannon, the artillery was rolled forward.  However, the soldiers were caught in a hail of fire and had to abandon the guns.  Suddenly, the Americans were exposed and at threat of being overrun.  Fortunately, the guerrillas held their position.  A Prussian Baron who happened to be traveling with the army urgently advised an attack, offering to lead it.  Fording the river rather than crossing the bridge, the Americans dislodged the guerrillas and took possession of the fortifications.  The 6-hour battle cost eleven dead and forty wounded, some mortally.

Cerro Gordo

On the 15th, the column arrived at Cerro Gordo, where General Scott had shattered Santa Anna's army in the middle of April.  When General Pierce marched through a month earlier, he experienced only harassment on the fringes of his army.  By contrast, Lally found himself once again in a battle.  The guerrillas had occupied the fortifications on the hills and contested his column's advance.  As luck would have it, a veteran of the April battle was part of the column and offered useful intel.  Lally's force assaulted the three hill forts, capturing 2 cannons, and 9,000 rounds of musket ammunition.  The battle cost another 3 lives and 10 wounded.

Xalapa

On the 19th, Lally approached Xalapa.  Once again, the guerrillas had taken up a position to oppose his advance.  For once, the guerrillas had not taken an advantageous position.  The Americans quickly flanked the enemy and sent them running in the 20-minute skirmish.  Despite the brevity, two more soldiers were killed and half a dozen wounded.  Lally waited until the following day to occupy Xalapa.  His thousand man column only have 700 effective soldiers, the rest sick, wounded, or dead.  Worse yet, the Louisiana troops deserted almost in mass and returned to Vera Cruz.  Lally opted to secure his forces in Xalapa.

A month later, Captain Sam Walker rode into Xalapa and declared that Colonel Childs was under siege in Puebla.  The sieging force was said to be 4,000 strong.  Despite the numbers, Lally prepared to march.  To his great good fortune, General Lane arrived the following day.  Lally attached his forces to Lane's and the army marched to relieve the Siege of Puebla and give Santa Anna his final defeat of the war.

Lally's column served as reserves at the Battle of Huamantla - October 9th - and later accompanied General Lane's forces for the Action at Atlixco on October 19th.  In December, his column went to Mexico City and the hodgepodge of companies joined their regiments, successfully delivering the reinforcements he had brought.