The Ultramarines is a chapter of the Space Marines in Eternal Crusade.
The Ultramarines are the most honoured of all the Space Marine Chapters, and were almost single-handedly responsible for holding the Imperium together after the Horus Heresy. Highly disciplined and selfless warriors, the Ultramarines have remained true to the teachings of their Primarch Roboute Guilliman for 10,000 years.
The peerless tactical acumen of Ultramarine leaders causes them to be inspirational figures not only to their own, but even those outside their Chapter. Whenever the enemies of Mankind threaten the Imperium, the Ultramarines stand ready to face them.