Caesar was now thirty-one years of age, and his one desire was to avenge himself on his enemies, Julius II., who had deprived him of his estates; on the King of Spain, who had treacherously imprisoned him; and on Louis XII., who had taken all his privileges from him, and who had even withheld the marriage portion. Louis had used the Borgia in securing Milan and Naples, and he had obtained Bretagne thanks to the dispensation of Caesar’s father permitting his marriage with Anne.
When Caesar found refuge at the Court of Navarre, his brother-in-law Jean d’Albret was in sore straits. On one side he was threatened by Ferdinand, the Catholic, who had always regarded Navarre as his prey, and on the other he was imperilled by the contentions of two factions, one headed by the Count of Agramont, the other by Luis de Beaumont, Count of Lerin. Louis XII. was doing all he could to foment the discord, and at this juncture D’Albret’s brother-in-law, Caesar, suggested that the King ask aid of the Emperor Maximilian, and offer him free passage through Navarre to Castile and Aragon. This suggestion immediately approved itself to Jean d’Albret. Caesar, of course, expected to be made commander of the forces of Navarre, and he at once set about putting the castles and strongholds of the kingdom in condition for defence, and enlisting such forces as Navarre could equip and maintain.
The first thing for Jean d’Albret to do was to put an end to the discord among his own subjects. Luis de Beaumont was then in possession of the castle of Viana, and he refused to surrender it on the King’s demand. His rebellion was of long standing. Luis had inherited his father’s affection for Castile, and in 1495 he had entered into an agreement with Ferdinand, the Catholic, by which he relinquished his estates in Navarre, and received in exchange for them equivalent domains in Castile. Thus he became a vassal of the Spanish monarch, and at the same time the latter secured a foothold in the kingdom of Navarre. The convention was duly ratified, but owing to the difficulty which was encountered in adjusting the exchange of estates it was soon abrogated.
Don Juan de Ribera, Captain-General of the Catholic Monarch, had taken charge of the domain hitherto in the possession of Beaumont, whose departure from Navarre had brought peace to the kingdom. Jean d’Albret of course was incensed by the occupation of a part of his territory by a representative of the King of Spain. He therefore went to Seville to endeavour to reach an understanding with Ferdinand; this he succeeded in doing, and the convention included a pardon for his rebellious count, to whom was also restored the office of constable and warder of the castle of Viana, while Don Juan de Ribera, Captain-General of Castile, returned to him all the estates he had conveyed to their Catholic Majesties. Luis de Beaumont was, however, a turbulent soul; his tomb in the monastery of Veruela bears the inscription: En un cuerpo tan pequeno nunca se vi tanta fuerza—Never before in body so small was there such strength.
Ever since 1505 he had regarded himself as the rightful owner of the castles, which he was merely holding for his sovereign, and, forgetful of D’Albret’s generosity, he refused to submit to him, and also continued to make inroads on his neighbours’ domains and appropriate their lands. He was endeavouring to build up a power to oppose the throne of Navarre and had established himself as a conqueror in the castle of Viana. While Jean d’Albret and Caesar were putting the strongholds of the country in fighting condition, the King sent an officer to Beaumont to demand the surrender of the place. Luis had the envoy seized, whipped, and confined in the castle of Larraga. Incensed when he was informed of this, and remembering how he had forgiven the count, the King sent to him three times and commanded him to appear; on his failure to do so he charged him with lese-majeste, declared all his goods confiscate, his titles, honours, and offices forfeit, and himself condemned to death.
Supported by Don Alonzo Carilli de Peralta, Count of San Sebastian, who was also on the side of Castile, Luis prepared to take the field.
War was declared between the King and his rebellious vassal, and Caesar, having been appointed Captain-General of the royal troops, set out February 11, 1507, to invest Larraga, whose defence had been entrusted by Beaumont to Ogier de Verastegui. Caesar attacked with great determination, but the place resisted bravely. Trusting to his lieutenants to cut off all means of communication, Valentino decided to go and attack Beaumont at his camp near Mendavia, adjacent to the small town of Viana, on the road to Logroño.
At Viana, near the frontier of Castile, D’Albret would be in an excellent position to receive reinforcements from the Count of Benavente, the Duke of Najera, and Maximilian’s partisans, who were anxious to begin a struggle which would open Castile to the son of Philippe le Beau.
Caesar’s force consisted of a thousand cavalry, more than two hundred lances, an escort of thirty men-at-arms, and five hundred foot-soldiers, with some siege guns and a few field-pieces. It was his intention to invest Viana, and then seek the Count, who had entrusted the defence of the town to his son Luis, and who had himself taken up a position near Mendavia.
Viana, being poorly supplied with provisions when the troops of Navarre appeared under her walls, was in no condition to resist a long siege. The Count of Lerin, aware of this, determined to re-victual the place; the undertaking was difficult and would have to be carried out, if at all, by night, for the Navarrais had entirely surrounded the town. The plan was favoured by a terrific storm which occurred during the night of March 11th, when Beaumont set out from Mendavia with two hundred lances and six hundred foot-soldiers, some of whom were armed with blunderbusses, to cover the line of his convoy, which consisted of sixty horses laden with flour. Profiting by the darkness, he advanced up to the very walls of the castle of Viana with a small force, having concealed the greater part of his men in a ravine near the town, so that they might be brought up quickly if needed. Everything was in his favour—the darkness, the storm, the relaxed vigilance of the besiegers, and he succeeded in getting his convoy into the stronghold by a secret gateway. Elated by his good fortune, Beaumont twice repeated the operation, and with equal success. He might have returned to his camp without being detected, but he decided to take advantage of the opportunity and reconnoitre, and, if possible, inflict some loss on the enemy.