Discovery of Kailos

The Discovery of Kailos was a momentous event in the history of the Howling Wolves] Space Marine Chapter when they discovered the long-lost Prius Prime and Prius Secundus sub-sectors that had been cut off from the rest of Humanity since the era of Old Night. Brought back into the Imperial fold, the Howling Wolves choose the inhospitable death world of Kailos to be their Chapter homeworld.

Background
Almost thirteen years later the Howling Wolves discovered a planet that was perfect for them to inhabit. It was located within the newly named Prius Sector, an area containing a lost long part of Humanity since the days of Old Night that was re-discovered in the most recent campaign of the Howling Wolves which saw the destruction of an Ork Warboss attempting to start up a WAAAGH!.

Within days of the defeat of the Orks, the lost fragment of Humanity was brought back into the fold, including a forge world, a feudal world, at least two hive worlds, an agri-world and a death world, all of which made up at least two whole sub-sectors. The Howling Wolves chose the first of the sub-sectors, which was named Prius Prime, the other being Prius Secundus. This sub-sector contained the death world of Kailos, the forge world of Ilux, and the hive world of Mordhau, with the world of Kailos being selected due to it being farthest from the other worlds and its inherent protection, being an inhospitable death world. Upon landing, the labour forces and architects brought along with them after confirming this with the High Lords of Terra began work on a grand keep built into the world's largest mountain ranges to isolate it from the many dangers below, but to also offer the greatest strategic placement possible. While this occurred the 10th Company began scouting operations to locate points of interest on the world as well as to identify the multiple species present while the rest of the Chapter fortified the local area.