Vostroya is a world in the Halo Zone beyond the Eye of
Terror, famous for its Vostroyan Firstborn regiments of the Imperial Guard.
Vostroya swore allegiance to Mars during the Age of Strife. It is ruled by the Techtriarchy, a council of Adeptus Mechanicus members and more traditional planetary government personnel/representatives. Since the Great Crusade, Vostroya has acted as an industrial world, supplying arms and ammunition to the armies of the Imperium. In the ten thousand years after the crusade, the Vostroyans have continued the same task, living and dying on the production lines and complying with the endless schedule of manufacturing and assembly. During the Horus Heresy, Vostroya refused to provide regiments to the Emperor, preferring instead to reserve the population in the manufactoria blanketing the world. After the Heresy came to an end the Vostroyans agreed to supply every first born son to serve in the Imperial Guard regiments. Vostroya technically is neither a hive world nor a forge world. Instead, it falls somewhere in between (labelled an Industrial World). The birth and death rates of 9.3 billion inhabitants are very high, keeping the population figures fairly stable (taking into account that first-born sons are extremely numerous, providing a massive amount of soldiers for the founding and reinforcement of Imperial Guard regiments.)
Vostroya has suffered many conflicts, including at least
eighteen "Great Wars".
The landscape is extremely bleak - highly polluted. Life
outside 'managed' zones is almost impossible. Animal and plant life is almost
non-existent. Most food is imported.
There are seven large and distinct administrative
zones/regions stretching around the planet's more temperate equatorial belt
(e.g. The Magdan, Sohlsvodd, Muskha, etc). The far colder north and south are
uninhabitable. Vostroya has one moon - Turtolsky.
