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Route_Locality60/110 / series
60Mark of CalthFocus
An anthology of short fiction set in the aftermath of the devastating betrayal on the world of Calth, exploring the underground war and survival amid the ruined planet. The stories expand on events introduced in earlier Ultramarines-focused novels and feature multiple authors. Supplementary reading that enriches the Calth storyline rather than driving the main plot.
In-universe span
~001.M31 - ~014.M31
Atlas range
001.M31 - 014.M31
Chronology certainty
range / medium
Faction trace
Ultramarines / Word Bearers / Chaos
Source audit
Source note pending
Generated text placeholder; no official cover art used.