Fenris is a star system comprised of three worlds -- Midgardia, Fenris and Frostheim -- all of which share a long elliptical orbit around the system's single small star, the Wolf's Eye. Frostheim has one small moon, Svellgard, and Fenris itself has a single moon known as Valdrmani, or the "Wolf Moon." Like all the home star systems of the Adeptus Astartes, the Fenris System boasts significant static defences, including orbital weapons platforms, minefields and two Ramilies-class Starforts. Only three times in the past ten thousand standard years has the Fenris System faced invasion by a force with the strength to potentially succeed at its conquest. The first was in 742.M32 by the Thousand Sons Traitor Legion during the First Battle of The Fang, the second during the Plague of Unbelief by