While Charles was absent from Provence, Marseilles, Arles and Avignonthree wealthy cities, directly subject to the emperorformed a league and appointed a Provençal nobleman, Barral of Baux, as the commander of their combined armies. Charles' mother-in-law put the disobedient Provençals under her protection. Charles could not deal with the rebels as he was about to join his brother's crusade. To pacify his mother-in-law he acknowledged her right to rule Forcalquier and granted a third of his revenues from Provence to her.