Complex sentence: Born at Mas-des-Saintes-Puelles, France, he became part of an army fighting in Spain and through that he was appointed tutor to the young king, James of Aragon.
Split into simpler sentences: Born at Mas-des-Saintes-Puelles, France. He became part of an army fighting in Spain and through that he was appointed tutor to the young king, James of Aragon.