Charles the Noble, King of Navarre, died in 1425. Having lost his only son, he bequeathed crown and kingdom to his daughter Blanche, married to Juan of Aragon, brother of Alphonso, King of Aragon and the Two Sicilies, and by reversion after her death to their son Charles, Prince of Viana. Juan of Aragon acted as viceroy to his brother whilst Alphonso was in Italy. On the death of Charles the Noble Juan and Blanche assumed the titles of King and Queen of Navarre. Blanche died in 1441, and by her will bequeathed the kingdom, in accordance with her father’s desire, to her son Charles of Viana. But Juan had no thought of surrendering the crown to his son. He married a young, handsome, and ambitious woman, Juana Henriquez, daughter of the Admiral of Castille, and she became the mother of Ferdinand, afterwards known as “the Catholic.” Thenceforth she schemed to obtain all that could be grasped for her own son Ferdinand. Charles was an amiable, accomplished youth, fond of literature and of the arts. Queen Blanche, in her will, had urged him not to assume the government without the consent of his father; but when, in 1452, the estates of Aragon recognized him as heir to the crown, and Juan declined to resign, Charles openly raised the standard of revolt. Juan marched against his son, and Charles was defeated, taken prisoner, and consigned to a fortress. There he remained for a year, and would have remained on indefinitely had not the Navarrese armed for his deliverance. Juan was forced to yield, and as a compromise confirmed Charles in the principality of Viana, and promised to abandon to him half the royal revenues. The reconciliation thus forcibly effected was not likely to last; in fact, the compromise suited neither party. The father burned to chastise sharply his rebellious son, and Charles chafed at being defrauded of the crown which was his undoubted heritage. Hence in 1455 both prepared to renew the contest. The following year, 1456, the prince was again defeated by his father, and was compelled to fly to his uncle Alphonso, who was then at Naples. During his absence Juan summoned the estates and declared that both Charles and his eldest daughter Blanche were excluded from succession to the throne--Charles on account of his rebellion, Blanche for having espoused his cause--and Juan proclaimed his youngest daughter Leonora to be his heir. Blanche had been married to, and then separated from, Henry the Impotent, King of Castille. Leonora was married to the Count of Foix.