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.