In 1342 , he refused to take the oath of fealty to Constance 's brother , Peter IV of Aragon .
James III wished to have friendly relations with Aragon , and thus married Constance in Perpignan on 24 September 1336 .
In 1342 , James III refused to take the oath of fealty to Constance 's brother , Peter IV of Aragon .
James III wished to have friendly relations with Aragon , and thus married Constance in Perpignan on 24 September 1336 .