Charles II served as Royal Lieutenant in Languedoc in 1351 and commanded the army which captured Port-Sainte-Marie on the Garonne in 1352. The same year he married Joan of Valois, the daughter of King John II of France. He soon became jealous of the Constable of France, Charles de La Cerda, who was to be a beneficiary of the fiefdom of Angoulême. Charles of Navarre felt he was entitled to these territories as they had belonged to his mother, the Queen of Navarre, but they had been taken from her by the French kings for a paltry sum in compensation.