Before commencing the assault, Vaca de Castro addressed a few remarks to his soldiers, in order to remove any hesitation that some might yet feel, who recollected the displeasure shown by the emperor to the victors as well as the vanquished after the battle of Salinas. He told them that their enemies were rebels. They were in arms against him. the representative of the Crown, and it was his duty to quell this rebellion and punish the authors of it. He then caused the law to be read aloud, proclaiming the doom of traitors. By this law, Almagro and his followers had forfeited their lives and property, and the governor promised to distribute the latter among such of his men as showed the best claim to it by their conduct in the battle. This last politic promise vanquished the scruples of the most fastidious; and, having completed his dispositions in the most judicious and soldier-like manner, Vaca de Castro gave the order to advance.21

As the forces turned a spur of the hills, which had hitherto screened them from their enemies, they came in sight of the latter, formed along the crest of a gentle eminence, with their snow-white banners, the distinguishing color of the Almagrians, floating above their heads, and their bright arms flinging back the broad rays of the evening sun. Almagro's disposition of his troops was not unlike that of his adversary. In the centre was his excellent artillery, covered by his arquebusiers and spearmen; while his cavalry rode on the flanks. The troops on the left he proposed to lead in person. He had chosen his position with judgment, as the character of the ground gave full play to his guns, which opened an effective fire on the assailants as they drew near. Shaken by the storm of shot, Vaca de Castro saw the difficulty of advancing in open view of the hostile battery. He took the counsel, therefore, of Francisco de Carbajal, who undertook to lead the forces by a circuitous, but safer, route. This is the first occasion on which the name of this veteran appears in these American wars, where it was afterwards to acquire a melancholy notoriety. He had come to the country after the campaigns of forty years in Europe, where he had studied the art of war under the Great Captain, Gonsalvo de Cordova. Though now far advanced in age, he possessed all the courage and indomitable energy of youth, and well exemplified the lessons he had studied under his great commander.

Taking advantage of a winding route that sloped round the declivity of the hills, he conducted the troops in such a manner, that, until they approached quite near the enemy, they were protected by the intervening ground. While thus advancing, they were assailed on the left flank by the Indian battalions under Paullo, the Inca Manco's brother; but a corps of musketeers, directing a scattering fire among them, soon rid the Spaniards of this annoyance. When, at length, the royal troops, rising above the hill, again came into view of Almagro's lines, the artillery opened on them with fatal effect. It was but for a moment, however, as, from some unaccountable cause, the guns were pointed as such an angle, that, although presenting an obvious mark, by far the greater part of the shot passed over their heads. Whether this was the result of treachery, or merely of awkwardness, is uncertain. The artillery was under charge of the engineer, Pedro de Candia. This man, who, it" may be remembered, was one of the thirteen that so gallantly stood by Pizarro in the island of Gallo, had fought side by side with his leader through the whole of the Conquest. He had lately, however, conceived some disgust with him, and had taken part with the faction of Almagro. The death of his old commander, he may perhaps have thought, had settled all their differences, and he was now willing to return to his former allegiance. At least, it is said, that, at this very time, he was in correspondence with Vaca de Castro. Almagro himself seems to have had no doubt of his treachery. For, after remonstrating in vain with him on his present conduct, he ran him through the body, and the unfortunate cavalier fell lifeless on the field. Then, throwing himself on one of the guns, Almagro gave it a new direction, and that so successfully, that, when it was discharged, it struck down several of the cavalry.22

The firing now took better effect, and by one volley a whole file of the royal infantry was swept off, and though others quickly stepped in to fill up the ranks, the men, impatient of their sufferings, loudly called on the troopers, who had halted for a moment, to quicken their advance.23 This delay had been caused by Carbajal's desire to bring his own guns to bear on the opposite columns. But the design was quickly abandoned; the clumsy ordnance was left on the field, and orders were given to the cavalry to charge; the trumpets sounded, and, crying their war-cries, the bold cavaliers struck their spurs into their steeds, and rode at full speed against the enemy.

Well had it been for Almagro, if he had remained firm on the post which gave him such advantage. But from a false point of honor, he thought it derogatory to a brave knight passively to await the assault, and, ordering his own men to charge, the hostile squadrons, rapidly advancing against each other, met midway on the plain. The shock was terrible. Horse and rider reeled under the force of it. The spears flew into shivers;24 and the cavaliers, drawing their swords, or wielding their maces and battle-axes,- -though some of the royal troopers were armed only with a common axe,—dealt their blows with all the fury of civil hate. It was a fearful struggle, not merely of man against man, but, to use the words of an eyewitness, of brother against brother, and friend against friend.25 No quarter was asked; for the wrench that had been strong enough to tear asunder the dearest ties of kindred left no hold for humanity. The excellent arms of the Almagrians counterbalanced the odds of numbers; but the royal partisans gained some advantage by striking at the horses instead of the mailed bodies of their antagonists.

The infantry, meanwhile, on both sides, kept up a sharp cross-fire from their arquebuses, which did execution on the ranks of the cavaliers, as well as on one another. But Almagro's battery of heavy guns, now well directed, mowed down the advancing columns of foot. The latter, staggering, began to fall back from the terrible fire, when Francisco de Carbajal, throwing himself before them, cried out, "Shame on you, my men! Do you give way now? I am twice as good a mark for the enemy as any of you!" He was a very large man; and, throwing off his steel helmet and cuirass, that he might have no advantage over his followers, he remained lightly attired in his cotton doublet, when, swinging his partisan over his head, he sprang boldly forward through blinding volumes of smoke and a tempest of musket-balls, and, supported by the bravest of his troops, overpowered the gunners, and made himself master of their pieces.

The shades of night had now, for some time been coming thicker and thicker over the field. But still the deadly struggle went on in the darkness, as the red and white badges intimated the respective parties, and their war-cries rose above the din,—"Vaca de Castro y el Rey,"— "Almagro y el Rey,"—while both invoked the aid of their military apostle St. James. Holguin, who commanded the royalists on the left, pierced through by two musket-balls, had been slain early in the action. He had made himself conspicuous by a rich sobre-vest of white velvet over his armour. Still a gallant band of cavaliers maintained the fight so valiantly on that quarter, that the Almagrians found it difficult to keep their ground.26

It fared differently on the right, where Alonso de Alvarado commanded. He was there encountered by Almagro in person, who fought worthy of his name. By repeated charges on his opponent, he endeavored to bear down his squadrons, so much worse mounted and worse armed than his own. Alvarado resisted with undiminished courage; but his numbers had been thinned, as we have seen, before the battle, to supply the governor's reserve, and, fairly overpowered by the superior strength of his adversary, who had already won two of the royal banners, he was slowly giving ground. "Take, but kill not!" shouted the generous young chief, who felt himself sure of victory.27

But at this crisis, Vaca de Castro, who, with his reserve, had occupied a rising ground that commanded the field of action, was fully aware that the time had now come for him to take part in the struggle. He had long strained his eyes through the gloom to watch the movements of the combatants, and received constant tidings how the fight was going. He no longer hesitated, but, calling on his men to follow, led off boldly into the thickest of the melee to the support of his stout-hearted officer. The arrival of a new corps on the field, all fresh for action, gave another turn to the tide.28 Alvarado's men took heart and rallied. Almagro's, though driven back by the fury of the assault, quickly returned against their assailants. Thirteen of Vaca de Castro's cavaliers fell dead from their saddles. But it was the last effort of the Almagrians. Their strength, though not their spirit, failed them. They gave way in all directions, and, mingling together in the darkness, horse, foot, and artillery, they trampled one another down, as they made the best of their way from the press of their pursuers. Almagro used every effort to stay them. He performed miracles of valor, says one who witnessed them; but he was borne along by the tide, and, though he seemed to court death, by the freedom with which he exposed his person to danger, yet he escaped without a wound.

Others there were of his company, and among them a young cavalier named Geronimo de Alvarado, who obstinately refused to quit the field; and shouting out,—"We slew Pizarro! we killed the tyrant!" they threw themselves on the lances of their conquerors, preferring death on the battle-field to the ignominious doom of the gibbet.29