During four days after our return from this expedition, the Indians of several neighbouring districts came in with presents and offers of submission. Although Cortes was well aware that they had been concerned in the murder of our men after the retreat from Mexico, he received them all very graciously, and dismissed them with promises of protection. About this time likewise, several nations who had joined with us in alliance made strong representations of the outrages which had been committed upon them by the Mexicans, of which they produced paintings in their manner, and earnestly entreated succour. But Cortes could not grant them the required assistance, as our army, besides having suffered loss by several being killed and many wounded during the late hostilities, was now grown very unhealthy. He gave them, however, fair promises, but advised them to rely more upon their own exertions and the assistance of our other allies, for which purpose he issued orders to all the districts in our alliance to assemble in arms against the common enemy. They accordingly collected their forces, and came to action in the field with the Mexicans, and exerted themselves with so much vigour that they gained the victory. The province of Chalco was however an object of principal importance to us, as the possession of that country was essentially necessary to preserve our communication with Tlascala and Villa Rica, and being likewise a fertile corn country, contributed largely to the subsistence of our army. As it was much harassed by the enemy, Cortes sent Sandoval with a detachment of about 250 of our troops, cavalry and infantry, to clear it of the Mexicans, and accompanied by a body of warriors from Tezcuco and such of our Tlascalan allies as still remained with our army. Sandoval set out from Tezcuco on the 12th of March 1521, and arrived next morning at Tlalmanalco, where he learnt that the Mexican forces were posted at a large town called Guaztepeque or Huaxtepec. Being now joined by the warriors of Chalco, Sandoval halted for the night at the town of Chimalcan; and next morning gave orders to his musketeers and crossbow-men to attack the enemy, who were posted in strong ground; the troops who were armed with swords and targets, were formed into a compact body of reserve; and the cavalry, being formed in small bodies of three each, were directed to charge as soon as the firing had made an impression on the enemy. While advancing in this order, Sandoval perceived the Mexican forces drawn up in three large columns or dense battalions, and thought proper to change his original plan, and to endeavour to break through them by a cavalry charge. Placing himself, therefore, at the head of the cavalry, he immediately proceeded to the charge, exclaiming, "St Jago! fall on, comrades!" The main body of the enemy was partly broken by this charge, but immediately closed again and stood firm; and the nature of the ground was so much in favour of the Mexicans, that Sandoval found it necessary to endeavour to drive them from their post in the manner first proposed, into the open ground in the rear. For this purpose he made the musketeers and crossbow-men attack the enemy in front, and those armed with swords and targets to turn their flanks, ordering also the allies to come forward to the attack, and directed the cavalry to be ready to charge at an appointed signal. Our troops at length forced them to retreat, but they immediately occupied another strong position in their rear, so that Sandoval and the cavalry were unable to make any considerable impression upon them. In one of the charges in this difficult broken ground, the horse of Gonzalo Dominguez fell with him, and he was so much injured that he died in a few days afterwards: His loss was much regretted by the army, as he was esteemed as brave as either Sandoval or De Oli. Our army broke the enemy a second time, and pursued them to the town, where they were suddenly opposed by not less than 15,000 fresh warriors, who endeavoured to surround our troops: But Sandoval caused them to be attacked on both flanks, when they fled towards the town, endeavouring however to make a stand behind some recently constructed works; but our troops followed them up so vigorously that they had no time to rally, and were constrained to take shelter in the town. As his troops were much fatigued, and had got hold of a good supply of provisions, Sandoval thought proper to allow them some repose, and they began to prepare their victuals, in which they were soon interrupted by an alarm of the enemy approaching. They were ready for action in a moment, and advanced to meet the enemy, fortunately in an open place; where, after a smart action, the enemy were constrained to retreat behind their works; but Sandoval pushed on the advantage with so much impetuosity, that he soon drove them from their works, and compelled them to evacuate the town with the utmost precipitation.

Sandoval took up his quarters in a very extensive and magnificent garden, which contained a number of large handsome buildings, and many admirable conveniencies fit for the residence of a great prince; but our soldiers had not then time to examine all its beauties, as it was more than a quarter of a league in length. I was not in this expedition, being confined under cure of a bad wound in my throat, which I received by a lance in the affair at Iztapalapa, and of which I still carry the marks; but I saw this fine garden about twenty days afterwards, when I accompanied Cortes to this place. Not being on this expedition, I do not in my narrative say we and us on this occasion, but they and them; yet every thing I relate is perfectly true, as all the transactions of every enterprize were regularly reported at headquarters. Sandoval now summoned all the neighbouring districts to submit, but to little purpose, as the people of Acapistlan or Jacapichtla answered by a defiance. This gave much uneasiness to our allies of Chalco, as they were assured the Mexicans would immediately attack them again on the Spaniards returning to Tezcuco. Sandoval was rather averse from engaging in any new enterprize, as a great number of his men were wounded, and the soldiers of Narvaez disliked risks of every kind; but our allies of Chalco were anxious to reduce that place, and were strongly supported in this opinion by Luis Marin, a wise and valiant officer; and as the distance was only two leagues, Sandoval acquiesced. On his advance, the enemy assailed him with their missile weapons, and then retired to their strong post in the town. Our allies were not very much disposed to attack the works, in which the Spaniards shewed them the way, some even of the cavalry dismounting to fight on foot, and leaving the rest in the plain to protect the rear. Our people at length carried the place, but had a good many wounded in the assault, even Sandoval himself. Though our allies were rather tardy in the assault, they made up for it after the place was carried, saving the Spaniards the trouble of putting the enemy to death; and indeed we often blamed the ferocious cruelty of our allies, from whom we saved many of our Indian enemies. At this time indeed, our countrymen thought themselves better employed in searching for gold and taking good female prisoners, than in butchering a parcel of poor wretches who no longer attempted any defence.

Sandoval returned to Tezcuco with many slaves and considerable plunder, and just as he arrived at head-quarters, even before he had time to make a report to Cortes of the success of his late expedition, an express arrived from Chalco with information that they were in a more perilous situation than before. Guatimotzin was enraged at the defection of the inhabitants of Chalco, and determined to inflict upon them the most exemplary chastisement. For this purpose, he sent a force of 20,000 Mexican warriors across the lake in 2000 canoes, with orders to lay waste the whole district with fire and sword. On the communication of this intelligence to Cortes, he was exceedingly enraged at Sandoval, believing that this had been occasioned by his negligence, and he gave him orders to return instantly to the defence of Chalco, refusing even to hear his relation of what he had already done. Sandoval was much hurt at this treatment, yet went back to Chalco with all possible expedition; but found the business over before his arrival, as the inhabitants of that province, having summoned their neighbours to their aid, had already repelled the Mexican invasion, and Sandoval had only to return to head-quarters with the prisoners.