Complex sentence: Red Talons were instrumental in the Impergium, the forceful control of human populations through violence, some elders known as the "Winter Council" are trying to reestablish the Impergium, though no one out side the Red Talons know about the Winter Council.
Split into simpler sentences: Red Talons were instrumental in the Impergium, the forceful control of human populations through violence, some elders known as the "Winter Council" are trying to reestablish the Impergium. Though no one out side the Red Talons know about the Winter Council.