Now, for a great number of years a harassing system of border warfare had been carried on between the Chichimecs and the Toltecs; the former doubtless raided upon their rich and powerful neighbors for purposes of plunder, and the latter were probably not slow to make reprisals which served as an excuse for extending their already immense territory. When the Toltec troubles arose, however, and the direful prophecies of Hueman began to be fulfilled, the people of Anáhuac found that they had enough to do to take care of themselves, and that their legions could be better employed in defending the capital than in waging aggressive wars upon the distant frontiers of the empire. They therefore recalled their troops, and the Chichimec border was left undisturbed. It was not long before the brother monarchs of Amaquemecan began to wonder at this sudden cessation of hostilities, and determined to find out the cause, for they were ignorant of the struggles and final overthrow of the Toltec empire. They at once dispatched spies into the Toltec territory. In a short time these men returned with the startling announcement that they had penetrated the enemy's country for a distance of two hundred leagues from Amaquemecan, and had found all that region deserted, and the towns, formerly so strong and populous, abandoned and in ruins.
Xolotl, who seems to have been of a more ambitious and enterprising disposition than his brother, listened eagerly to this report, which seemed to promise the fulfillment of his dreams of independent and undivided sway. Summoning his vassals to the capital, he told them what his spies had seen, and in an eloquent speech reminded them that an extension of territory was needed for their increasing population, expatiated on the richness and fertility of the abandoned region, pointed out to his hearers how easy it would be to avenge on their crippled enemies the injuries of many years, and concluded by requiring them to be ready to accompany him to conquest within the space of six months.[V-5]
It is difficult to credit the statements of the old authors respecting the number of Chichimecs that espoused Xolotl's cause. Ixtlilxochitl and Veytia state that no less than three million two hundred and two thousand men and women, besides children, rallied to his standard, leaving one million six hundred thousand subjects of Acauhtzin, and thus making it not a mere expedition, but a decided emigration. Torquemada, who fears he will not be believed if he states the actual number who took part in the exodus, takes pains to assure us that the historic paintings mention over a million warriors, commanded by six great lords, and over twenty (two?) thousand inferior chiefs and captains, and as each of these had under him more than a thousand men, the total number would approach nearer to the larger numbers than to Torquemada's unwontedly modest statement. The number was ascertained by census, taken at five different places to check the increase or decrease caused by leaving colonists along the route, by new arrivals, and especially by deserters. The counting was effected by each plebeian casting a small stone into a heap set apart for his class, and each lord or officer a larger stone into another heap. Ixtlilxochitl mentions two of these _nepohualcos_, or 'counting-places,' one near Oztotipac in Otompan district, and another three leagues from Ecatepec, near Mexico; while Torquemada refers to twelve similar hillocks near Tenayocan.[V-6]