one daughter, Joanna. However, her paternity was questioned; it was rumored that his wife, Queen Joan of Portugal (Afonso's sister) had an affair with a nobleman named Beltrán de La Cueva. The death of Henry ignited a war of succession with one faction supporting Joanna and the other supporting Isabella, Henry's half-sister. Afonso V was persuaded to intervene on behalf of Joanna, his niece. He betrothed himself to her, proclaimed himself king of Castile and led troops into the kingdom. Because of their close blood-relationship, a formal marriage had to wait for papal dispensation. On May 12, 1475, Afonso entered Castile with an army of 5,600 cavalry and 14,000 foot soldiers. In March 1476, after several skirmishes and much maneuvering, the 8, 000 men of Afonso and Prince João, faced a Castilian force of similar size in the battle of Toro. The Castilians were led by Isabella's husband, Prince Ferdinand II of Aragon, Cardinal Mendoza and the Duke of Alba. The fight was fierce and confusing but the result was a stalemate: While the forces of Cardinal Mendoza and the Duke of Alba won over their opponents led by the Portuguese King –who left the battlefield to take refuge in Castronuño, the troops commanded by Prince Joao defeated and persecuted the troops of the Castilian right wing, recovered the Portuguese royal standard, remaining ordered in the battlefield where they collected the fugitives of Afonso. Both sides claimed victory but Afonso's prospects for obtaining the Castilian crown were severely damaged. After the battle, Afonso sailed to France hoping to obtain the assistance of King Louis XI in his fight against Castile. But finding himself deceived by the French monarch, he returned to Portugal in 1477. Disillusioned, he abdicated for a few days in November 1477 in favor of his son John II, then after returning to the throne, he retired to a monastery in Sintra, where he died in 1481. Marriages and descendants Afonso married firstly, in 1447, Isabella of Coimbra, with whom he had three children: John, Prince of Portugal (29 January 1451). Joan, Princess of Portugal (6 February 1452 – 12 May 1490): Known as Saint Joan of Portugal or Saint Joan Princess. John II of Portugal (3 March 1455 – 25 October 1495): Succeeded his father as 13th King of Portugal. Afonso married secondly, in 1475, his niece Joanna of Castile, known as "La Beltraneja". Ancestry Notes Bibliography