[Sidenote: ANÁHUAC IN THE SIXTH CENTURY.]
During the sixth and seventh centuries we must imagine Anáhuac and the adjoining territory on the north and west, for a broad but unknown extent, as being gradually occupied by numerous Nahua nations of varying power and numbers and of varying degrees of civilization. Some were originally or soon became in their new homes wild hunting tribes, powerful but rude, the terror of their neighbors; others settled in the fertile valleys, lived by agriculture, and retained much of their original culture. The more powerful nations, probably the most advanced in culture as well, established themselves in and about the valley of Mexico, where their capitals were soon flourishing cities, and where all branches of aboriginal art received more attention than elsewhere and were correspondingly developed. These central peoples became known, perhaps at once, but more probably at a later date, as Toltecs, a name which, whatever its original derivation and signification, became synonymous with all that is skillful and excellent in art. On the other hand the outside Nahua nations, many of which had lost in their new life something of the true Nahua polish, and all of whom were regarded more or less as barbarians by their more favored brothers of the lake shores, were from this time known as Chichimecs, whatever may have been the original application of that name.
It has been remarked that little or nothing is known of the events that occurred during these two centuries, during which the whole western section of the country came into possession of numerous Nahua tribes, as the eastern section had done long before, and as the whole country remained down to the Spanish Conquest; for there is little evidence of any subsequent migrations from or into Mexico. Ixtlilxochitl and the Spanish writers, Torquemada, Vetancvrt, Clavigero, Duran, Veytia, and the rest, confine their attention to the Toltecs proper, their migration from Huehue Tlapallan to Tulancingo, which I have already narrated, their subsequent removal to Tollan, the establishment of their monarchy, and the succession of their kings. According to these authors, the Toltecs met no opposition, Tollan had no rivals nor allied capitals. Brasseur de Bourbourg, however, finds in the _Codex Chimalpopoca_, already alluded to,[IV-3] and the _Memorial de Culhuacan_,[IV-4] another similar chronologic record in the Nahua language, a slight account of some of the other nations that settled in Anáhuac at this period, even prior to the establishment of the Toltecs at Tollan. These two documents are the chief authorities for the whole Toltec period, and since neither of them has ever been published, nothing remains but to accept the version given by the abbé.[IV-5] The Mixcohuas were the first of the new tribes that came into notice in the annals. They first appear at Chalchiuhapan, afterwards Tlascala, but soon present themselves before the priests of Teotihuacan to receive their sanction and become 'vassals of the Sun.' Faithless to the vows taken at the sacred city, the new-comers, instead of establishing themselves peaceably in the land, proved at first a torment to the older inhabitants and a source of great anxiety to the priests who had encouraged their coming; but the first bands of Mixcohuas were finally subdued and forced to submit to the requirements of the priests of the Sun by the aid of other succeeding but kindred bands of Chichimecs. Thus the first epoch of Nahua occupation was one of strife, during which the name of Mixcohuatl, or Mixcohuatl Mazatzin, 'the hunter,' is most prominent; together with those of Xiuhnel and Mimich, who defeat the Olmecs at Huitzilapan. The united bands under Mixcohuatl are known in the tradition as Chichimec Culhuas, the founders of the city of Culhuacan on the lake shore, who in a period of sixteen years--from 670 to 686, according to the authorities--became masters of nearly the whole region south and east of the lakes.[IV-6] At about the same time the province of Quauhtitlan, 'land of forests,' north-west of the lakes, seems to have been occupied by another Chichimec nation--for all are known in the traditions as Chichimecs whenever they are alluded to as coming from without the valley, but become good Toltecs as soon as they acquire a degree of power within its limits. Chicon Tonatiuh, 'seven suns,' is named as the leader of this nation, and the chief cities of the province were Huehuetocan, 'city of old men,' and Macuexhuacan, 'city of necklaces.'