the marriage. John quickly came to regard this son with jealousy. After his second marriage, to Juana Enríquez, it grew into absolute hatred, being encouraged by Juana. John tried to deprive his son of his constitutional right to act as lieutenant-general of Aragon during his father's absence. Charles's cause was taken up by the Aragonese, however, and the king's attempt to make his second wife lieutenant-general was set aside.

There followed the long Navarrese Civil War,