Marozia in the meantime had married Margrave Guy of Tuscany. Soon a power struggle began between them and Pope John, with John’s brother, Peter, the first to feel their enmity. John had Peter made duke of Spoleto after Alberic’s death, and his increased power threatened Guy and Marozia. Peter was forced to flee to Lake Orta, where he sought the aid of a rampaging band of Magyars. In 926 he returned to Rome in their company, and with their support he intimidated Guy and Marozia, and Peter was allowed to return to his old role as principal advisor to and supporter of Pope John.