Complex sentence: The coalition was also joined by a group from Ossary and O’Ryan a chieftain of the Odrone where they combined with the Vikings and the men of the desise and formed three bands in which to confront Raymond.
Split into simpler sentences: The coalition was also joined by a group from Ossary and O’Ryan a chieftain of the Odrone. Together they combined with the Vikings and the men of the Desies and formed three bands in which to confront Raymond.