But every man had that within his bosom which spoke louder than the voice of the general. Despair gave unnatural energy to his arm. The naked body of the Indian afforded no resistance to the sharp Toledo steel; and with their good swords the Spanish infantry at length succeeded in staying the human torrent. The heavy guns from a distance thundered on the flank of the assailants, which, shaken by the iron tempest, was thrown into disorder. Their very numbers increased the confusion, as they were precipitated on the masses in front. The horse at the same moment, charging gallantly under Cortés, followed up the advantage, and at length compelled the tumultuous throng to fall back with greater precipitation and disorder than that with which they had advanced. More than once in the course of the action a similar assault was attempted by the Tlascalans, but each time with less spirit and greater loss. They were too deficient in military science to profit by their vast superiority in numbers. They were distributed into companies, it is true, each serving under its own chieftain and banner. But they were not arranged by rank and file, and moved in a confused mass, promiscuously heaped together. They knew not how to concentrate numbers on a given point, or even how to sustain an assault, by employing successive detachments to support and relieve one another. A very small part only of their array could be brought into contact with an enemy inferior to them in amount of forces. The remainder of the army, inactive and worse than useless, in the rear, served only to press tumultuously on the advance and embarrass its movements by mere weight of numbers, while on the least alarm they were seized with a panic and threw the whole body into inextricable confusion. It was, in short, the combat of the ancient Greeks and Persians over again. Still, the great numerical superiority of the Indians might have enabled them, at a severe cost of their own lives, indeed, to wear out, in time, the constancy of the Spaniards, disabled by wounds and incessant fatigue. But, fortunately for the latter, dissensions arose among their enemies. A Tlascalan chieftain, commanding one of the great divisions, had taken umbrage at the haughty demeanor of Xicotencatl, who had charged him with misconduct or cowardice in the late action. The injured cacique challenged his rival to single combat. This did not take place. But, burning with resentment, he chose the present occasion to indulge it, by drawing off his forces, amounting to ten thousand men, from the field. He also persuaded another of the commanders to follow his example.