Astorgius was an Imperial Cardinal World that was the primary inhabited planet of the Thaxaril System in the Chalnath Expanse of the nothern Ultima Segmentum in the Imperium Nihilus. It was one of the worlds of that region that was caught up in the multi-sided conflict between the Imperium and various xenos powers that was known as the Chalnath Expanse Campaign.
Astorgius was celebrated across the sector for its magnificent architecture, incredible wealth and priceless Adeptus Ministorum relics.
The world was devastated by the invasion of the forces of the T'au Empire's Fifth Sphere Expansion into the Thaxaril System under the leadership of Commander Shadowsun. Even as the forces of the Imperium and the T'au waged their war for control of the planet, neither realised that Astorgius was also home to a large Genestealer Cult infestation, which had yet to make its presence known.
Sources[]
- Psychic Awakening: The Greater Good (8th Edition), pp. 6, 8