Calth

Calth
As part of Ultramar, an area under the jurisdiction of the Ultramarines, Calth provides recruits for the Ultramarines Chapter. The aspirants compete in a series of contests between hopefuls to determine who is worthy of joining the Space Marines. Calth's inhabitants live in subterranean cities where the deadly light of Calth's blue sun cannot reach them. The caverns of Calth are constructed on such a huge scale, and with such grandeur, that they are as light and airy as any city of Macragge. The world above is devoid of air, the atmosphere stripped away during the Horus Heresy, when the Ultramarines and the traitorous Word Bearers, under the command of Kor Phaeron and Erebus the Dark Apostle, came into conflict.

Although the inhabitants are perfectly capable of living on what is grown in nutrient vats, they prefer to import foodstuffs from Iax. The shipyards of Calth also earn the world a name to look up to, their vessels used by the Ultramarines and the Imperium at large.

The Ultramarines captain Uriel Ventris was born upon Calth. The Tyranid "character" Old One Eye was discovered on Calth in icepacks. At least one regiment of the Imperial Guard has been raised on Calth. [edit] Catachan