Deluge

Deluge was a world fought over during the Horus Heresy; no segmentum, system, or coordinates are recorded for it, so this Deluge is not identified with any other world of the same name.

The World Eaters, under the daemon primarch Angron, killed the population of Deluge, and Perturabo’s Iron Warriors fought them there in response. One account dates the battle to about 013.M31, while a Heresy battle list places it in the 011–012.M31 period.