The primarch of the Ultramarines is Roboute Guilliman, also referred to as ... as well as hordes of chaos cultists and renegade marines. Marneus Calgar is the Chapter Master of the Ultramarines ...

I know a lot of folks like to talk trash about the Ultramarines. They are easy targets as they are the poster boys for 40k. And, for years, Marneus Calgar was their Chapter Master — he still is even ...