When the Spaniards reached the Canal of the Toltecs, in Tlaltecayohuacan, they hurled themselves headlong into the water, as if they were leaping from a cliff. The Tlaxcaltecas, the allies from Tliliuhquitepec, the Spanish foot soldiers and horsemen, the few women who accompanied the army-all came to the brink and plunged over it.
The canal was soon choked with the bodies of men and horses; they filled the gap in the causeway with their own drowned bodies. Those who followed crossed to the other side by walking on the corpses.
When they reached Petlalco, where there was another canal, they crossed over on their portable bridge without being attacked by the Aztecs. They stopped and rested there for a short while, and began to feel more like men again. Then they marched on to Popotla.
Dawn was breaking as they entered the village. Their hearts were cheered by the brightening light of this new day: they thought the horrors of the retreat by night were all behind them. But suddenly they heard war cries and the Aztecs swarmed through the streets and surrounded them. They had come to capture Tlaxcaltecas for their sacrifices. They also wanted to complete their revenge against the Spaniards.
The Aztecs harried the army all the way to Tlacopan. Chimalpopoca, the son of Motecuhzoma, was killed in the action at Tlilyuhcan by an arrow from the crossbows. Tlaltecatzin, the Tepanec prince, was wounded in the same action and died shortly after. He had served the Spaniards as a guide and advisor, pointing out the best roads and short cuts.