The centre of the battle was a farm-house on the Espejo estate, which was charged furiously by both sides, being taken and retaken several times during the day. Yet as the day went on the advantage seemed to be on the side of Osorio, who held the field with the centre and one wing of his army. Defeat seemed the approaching fate of the patriots. It came nearer when the regiment of negroes which had for some time withstood the Burgos regiment—the flower of Osorio’s force—gave way and retreated, leaving four hundred of its number stretched upon the field. The critical moment of the battle was now at hand. The Burgos regiment attempted to follow up its success by forming itself into a square for a decisive charge. In doing so the Spanish lines were broken and thrown into temporary disorder. Colonel O’Brien, a gallant cavalry officer of Irish blood, took quick advantage of this. Joining his troops with Quintana’s reserves, he broke in a fierce charge upon the Burgos regiment while in the act of reforming and drove it back in complete confusion. This defeat of the choice corps of Osorio’s army changed the whole aspect of affairs. The patriots, inspired with hope, boldly advanced and pressed their foes at all points. The Burgos troops sought refuge in the farm-house, and were followed by the left, which was similarly broken and dispersed. The centre kept up the action for a time, but with both wings in retreat it also was soon forced back, and the whole royalist army was demoralized. The patriots did not fail to press their advantage to the utmost. On all sides the royalists were cut down or captured, until nearly half their force were killed and wounded and most of the remainder taken prisoners. A stand was made by those at the farm house, but they were soon driven out, and about five hundred of them killed and wounded in the court and vineyard adjoining. Of the total army less than three hundred escaped, General Osorio and some other officers among them. These fled to Concepcion, and embarked from there to Peru. Of the patriots more than a thousand had fallen in the hot engagement. This brilliant and decisive victory, known as the battle of the Maypo, gave San Martin immense renown, and justly so, for it established the independence of Chili. Nor was that all, for it broke the power which Abascal had long sustained in Peru, and opened the way for the freeing of that land from the rule of Spain. This feat also was the work of San Martin, who soon after invaded Peru, and, aided by a Chilian fleet, conquered that land from Spain, proclaiming its independence to the people of Cuzco on the 28th of July, 1821. Later on, indeed, its freedom was seriously threatened, and it was not until 1824 that General Bolivar finally won independence for Peru, in the victory of Ayacucho. Yet, famous as Bolivar became as the Liberator of South America, some generous portion of fame should rightly be accorded to San Martin, the Liberator of Chili.