Complex sentence: The most prominent factions at the beginning of the story are those of Prince Goltana and Prince Larg, both are nobles seeking to obtain control of the throne by being the guardian to the monarch's young heir and were thus engaged in a war.
Split into simpler sentences: The most prominent factions at the beginning of the story are those of Prince Goltana and Prince Larg. Both are nobles that sought to obtain control of the throne by being the guardian to the monarch's young heir and were thus engaged in a war.