Huexotzinca
The people of Huexotzinco, a Nahua city-state east of the volcanoes, often at war with the Mexica. Their warriors marched with Cortés into Tenochtitlan in 1519.
Moctezuma Comes Out to Meet the Strangers
Bernardino de Sahagún and his Nahua informants, History of the Conquest of Mexico (Book XII of the General History of the Things of New Spain), chapters 15–16, edited by Carlos María de Bustamante (1829) · compiled from the 1550s to the 1570s (events of November 1519)
Partieron los Españoles de Itztapalapan todos aderezados á punto de guerra y en su ordenanza por escuadrones: fueron algunos de á caballo delante á descubrir si habia alguna celada; llevaban tambien dos lebreles delante: iba en la retaguardia D. Hernando Cortés con otros muchos Españoles todos armados y en su ordenanza, tras ellos iba el bagage y la artilleria en sus carretones; iban muchos Indios de guerra con todas sus armas, muchos tlaxcaltecas, y Huexotzincas: de esta manera ordenados entraron en México. En todo lo restante de este capítulo no se dice otra cosa sino la órden que llevaban los Españoles y los Indios amigos cuando entraron en México.
The Spaniards set out from Itztapalapan all ready for war, marching in order by squadrons. Some horsemen went ahead to see whether there was an ambush. They also took two greyhounds in front. In the rearguard came Don Hernando Cortés with many other Spaniards, all armed and in their ranks. Behind them came the baggage and the artillery on its carts. Many Indian warriors came too, with all their weapons, many Tlaxcaltecas and Huexotzincas. In this order they entered Mexico. The rest of this chapter says nothing else except the order in which the Spaniards and their Indian allies marched when they entered Mexico.