By the end of the year, open warfare had broken out between the two camps. Louis's movements can be traced during the period of civil war, in which his mother sided with the pro-Angevin (Neapolitan) party. He was at Lentini from late March through April 1349 and at Augusta in May and early June. Around this time, between May and July, the queen mother died and her role was taken up by Louis's older sister, the abbess Constance. From late June through July Louis was with the army besieging Catania. By 22 July Louis had returned to Lentini. In September and October he was at Castrogiovanni, in November at Agira and in December at Messina.