The perilous situation of the Christian cavaliers, pent up and beleaguered within the walls of the Alhama, spread terror among their friends and anxiety throughout all Andalusia. Nothing, however, could equal the anguish of the marchioness of Cadiz, the wife of the gallant Roderigo Ponce de Leon. In her deep distress she looked round for some powerful noble who had the means of rousing the country to the assistance of her husband. No one appeared more competent for the purpose than Don Juan de Guzman, the duke of Medina Sidonia. He was one of the most wealthy and puissant grandees of Spain; his possessions extended over some of the most fertile parts of Andalusia, embracing towns and seaports and numerous villages. Here he reigned in feudal state like a petty sovereign, and could at any time bring into the field an immense force of vassals and retainers.
The duke of Medina Sidonia and the marques of Cadiz, however, were at this time deadly foes. An hereditary feud existed between them, which had often risen to bloodshed and open war; for as yet the fierce contests between the proud and puissant Spanish nobles had not been completely quelled by the power of the Crown, and in this respect they exerted a right of sovereignty in leading their vassals against each other in open field.
The duke of Medina Sidonia would have appeared, to many, the very last person to whom to apply for aid of the marques of Cadiz; but the marchioness judged of him by the standard of her own high and generous mind. She knew him to be a gallant and courteous knight, and had already experienced the magnanimity of his spirit, having been relieved by him when besieged by the Moors in her husband's fortress of Arcos. To the duke, therefore, she applied in this moment of sudden calamity, imploring him to furnish succor to her husband. The event showed how well noble spirits understand each other. No sooner did the duke receive this appeal from the wife of his enemy than he generously forgot all feeling of animosity and determined to go in person to his succor. He immediately despatched a courteous letter to the marchioness, assuring her that in consideration of the request of so honorable and estimable a lady, and to rescue from peril so valiant a cavalier as her husband, whose loss would be great, not only to Spain, but to all Christendom, he would forego the recollection of all past grievances, and hasten to his relief with all the forces he could raise.
The duke wrote at the same time to the alcaydes of his towns and fortresses, ordering them to join him forthwith at Seville with all the forces they could spare from their garrisons. He called on all the chivalry of Andalusia to make a common cause in the rescue of those Christian cavaliers, and he offered large pay to all volunteers who would resort to him with horses, armor, and provisions. Thus all who could be incited by honor, religion, patriotism, or thirst of gain were induced to hasten to his standard, and he took the field with an army of five thousand horse and fifty thousand foot.* Many cavaliers of distinguished name accompanied him in this generous enterprise. Among these was the redoubtable Alonso de Aguilar, the chosen friend of the marques of Cadiz, and with him his younger brother, Gonsalvo Fernandez de Cordova, afterward renowned as the grand captain; Don Roderigo Giron also, master of the order of Calatrava, together with Martin Alonso de Montemayor and the marques de Villena, esteemed the best lance in Spain. It was a gallant and splendid army, comprising the flower of Spanish chivalry, and poured forth in brilliant array from the gates of Seville bearing the great standard of that ancient and renowned city.