Ailinne

Ailinne is a Feudal World located in the Galactic North of Segmentum Ultima and serves as the Homeworld and primary recruiting world of the Iron Spears Chapter of the Adeptus Astartes. The Iron Spears 10th Clan Company is charged with the defense of their homeworld. Astrographically, it is relatively close to the Blood Angels homeworld of Baal.

Climate, Geography, and Orbit
Ailinne's surface consists of mountain ranges and large tundra valleys. The planet's climate is frigid, with temperatures ranging from 10 °C during the summer and dropping all the way to -50 °C in the winter (when all the land masses are covered in snow). The planet is around is 78% water. Precipitation is common; with cold thunderstorms in the summer and heavy snow in the winter.

Located on the largest continent of Leix is the Iron Spears Fortress-Monastery of Dunbairrche. The Fortress-Monastery is built on a large flat tundra surrounded almost entirely by a ring of mountains called the Black Mountains, creating a natural protective barrier that is used to keep out the tribal populace. The only opening in the Black Mountains is the narrow Blackstair Pass.

Ailinne is unique in that it's seasons are not based on planetary tilt, rather they are based on the planet's very slight elliptical orbit (making seasonal weather the same across the planet). Summer indicates the closest distance to the sun while winter indicates the farthest distance. While the overall change in the distance to the sun is nominal, it is great enough that the landmasses are completely blanketed in snow and ice during the winter months.

Culture and Government
Ailinnean culture is considered to be highly reminiscent of the Celtic culture found on ancient Terra. The populated is divided into one-hundred-nineteen warring clans that inhabit fortresses-cities spread across the planet. These clans act as semi-independent nations, but all clans swear fealty to the High King. Since the creation of the Iron Spears Chapter, the Chapter Master has served as the High King of Ailinne.

Religion
The native religion is a some-what different version of the Imperial Cult. A major variation is the centered worship of Sanguinius, Primarch of the residing Iron Spears Chapter.

Satellite
Ailinne is orbited by a single satellite, Ibrickane, a forested feral moon that serves as a secondary source of recruits for the Iron Spears.