Avisia

Avisia is an Industrial World in the Tamahl Sector of Segmentum Obscurus, located in the galactic north. It is one of the many such resource-rich planets throughout the Imperium of Man, having much of its surface covered in sprawling factories whose purpose is to produce goods for other worlds of Mankind.

Geography
Records indicate that originally the planet was more terrestrial, similarly to Terra, covered in lush forests and jungles, large oceans, along with some tundras at the poles and deserts around the equator. However, that changed in the centuries after it was discovered and exploitation of the materials beneath its soil began. Much of its flora and fauna died off, along with most of its native animal species, while its oceans dried out. In modern day, much of the Avisian terrain—that is, what lies underneath the factories and garbage—is a barren wasteland. Those areas not covered in urban complexes are used as a dump for the refuse, covered in mounds of junk and pools of toxic sludge, with old starships poking out like mountains, all of it cloaked over by a thick, foul-smelling fog. The atmosphere is also poisoned, requiring humans to wear masks and hazmat suits when not inside one of the urban centers.

The cities are spread around the many, many factories dotting the planet's surface. The population centers are connected by high-speed maglev trains, which also transport completed goods from factories to spaceports for shipment offworld. Development of the planet was greatly hindered during the Old Night, but it resumed again upon its rediscovery to the point where much of the planet is urbanized.

History
The world of Avisia was first thought to have been colonized around M17 by a colony ship traveling at sublight speeds. Aboard the vessel, a ruling aristocracy had been created over the course of the long voyage, and at the time they arrived the colonists formed a monarchy. Their advanced technology helped to develop the planet, and as soon as resources were discovered the construction of factories and refineries to process them began. Thanks to the richness of the resources Avisia became fairly self-sufficient, although it became cut off from the rest of human civilization as the Warp storms intensified around M23-M25. As the Age of Strife began, the Avisian ruling regime clamped down on the subjects in order to prevent the mass panic from turning into a revolt. Development of the world also stopped for some time as the technology to continue expansion of urban infrastructure at such a rapid rate was lost.

Being one of the colonies slightly better off due to its abundance of resources and decent technology, it did not fall apart into chaos and continued to function on its own, spreading out from Avisia to other worlds in the system to create smaller colonies. Over time, the Avisians developed a rigid social system with an aristocracy that represented about 15-20% of the population and a commoner class that represented about 80-85%. While it's social structure could be described as feudalistic, the world's economy was more developed and allowed commoners to rise through the social ladder. The planet continued to exist in this isolated state until being rediscovered by Mankind during the Great Crusade. Agreeing to join the Imperium, the Avisian rulers gave access to their planet's resources to the Emperor of Man. Imperial technology helped develop the planet further, and by M32 the world had been transformed into the largely industrialized planet it is at the time of M41.

However, by the 41st Millennium, the planet's resources had started running out after many centuries of exploitation, and thus Avisia has become an increasingly backwater and forgotten world. It makes up for its downturn in production by establishing regiments of the Imperial Guard to fight for the Emperor.