 France intervened in support of Portugal, as they were rivals with Aragon for territory in Italy and Roussillon.Despite a few initial successes by the supporters of Joanna, a lack of military aggressiveness by Afonso V and the stalemate in the Battle of Toro (1476) led to the disintegration of Joanna's alliance and the recognition of Isabella in the Courts of Madrigal-Segovia (April–October 1476)