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The Long Night

The period between the formation of the warp storm surrounding the system at the peak of the Horus Heresy and it's dissolution in M39

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31006

The Great Dusk
Celestial

After a grave defeat within the subsector, Lorgar envelops the celestial area in an impenetrable warp storm in retribution.

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Imperium Praeteritus
39006

The Golden Dawn
Era beginning/end