The XIII Legion of Roboute Guilliman and, after the Heresy, the model Chapter of the Codex Astartes. They rule the realm of Ultramar from Macragge and many Chapters descend from their gene-seed.
Characters (4)
Cato Sicarius
Commander of the Victrix Honour Guard, former Captain of the Ultramarines 2nd Company
Ultramarines
Marneus Calgar
Chapter Master of the Ultramarines, Lord Macragge
Ultramarines
Roboute Guilliman
Primarch of the Ultramarines, Lord Regent of the Imperium
Ultramarines
Uriel Ventris
Captain of the Ultramarines 4th Company
UltramarinesNotable encounters
Grandfather Nurgle enemy Nurgle's Plague Wars targeted Ultramar.
Related factions
Adeptus Astartes (all Chapters)Dark AngelsThe FallenBlood AngelsSpace WolvesImperial FistsWhite ScarsSalamandersRaven GuardIron HandsBlack TemplarsCrimson FistsGrey Knights