umn, with the wagon-train, was nearly two miles in length. On arriving near the National Bridge, he found it obstructed and defended, in the same manner as on the passage of the river by General Cadwalader; but he was unable to place his artillery in a commanding position, and orders were therefore given to charge upon the enemy. Lieutenant Colonel Bonham, of the 12th infantry, at the head of his battalion, rushed forward under a heavy fire from the enemy's escopetas, followed by Captain Duperu, with his company of the 3rd dragoons, sword in hand. The men leaped over the barricade upon the bridge, and in the space of ten minutes the guerilleros were flying in every direction. The command proceeded to the Rio del Plan, where they discovered that the main arch of the bridge had been blown up. Having crossed the river, General Pierce continued on his way to join General Scott. He was five times attacked by the guerilleros, including the rencontre at the Puente Nacional, but repulsed them on every occasion.
On the approach of General Pierce with his reinforcement, General P. F. Smith was sent out from Puebla to clear the road in front of the former, said to be obstructed by the enemy, with a considerable detachment. He succeeded in breaking up a large guerilla establishment at San Juan de los Llaños. General Pierce found the way opened before him, and arrived at Puebla on the 6th of August. General Scott had already issued his orders for the advance to the Mexican capital; and on the 7th instant General Twiggs' division, preceded by the brigade of cavalry under Colonel Harney, took up the line of march for the far-famed halls of the Montezumas. The divisions of Generals Quitman, Worth, and Pillow, followed, at intervals of one
