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In the 13th Black Crusade, Ardium was one of the many worlds of Ultramar that were invaded by the Chaos forces of Abaddon the Despoiler. During its invasion, the Bitter Sons Warband captured one of Ardium's subterranean Hives, but the reborn Primarch Roboute Guilliman later led the Ultramarines to free the world and destroyed the Warband.
- 1: Gathering Storm: Rise of the Primarch, Chapter 2: War Zone Ultramar
- 2: Dark Imperium (Novel), Chapter 20
- 3: Warhammer 40,000 8th Edition Rulebook, pgs. 158–159
- 4: Codex: Space Marines (8th Edition), pg. 25