|Map||Basic Data||Planetary Image|
|Class:||Xenos World, Ork World, Ice World|
Of limited interest to the Imperium due to the difficulty in colonising it and the poor range of resources present on the planet, the defenders of the Armageddon system nevertheless fought for it during the Second War for Armageddon. Small tribes of Feral Orks landed on the planet and presented a danger. They were hunted down and thought exterminated by Imperial forces such as the Armageddon Ork Hunters.
However, during the Third War for Armageddon, when Orks once again landed on Chosin, their numbers swelled so rapidly that Imperial tacticians questioned whether they had really managed to wipe out the Feral Orks at all. The Orks spread all over the planet, infesting it completely and putting its reclamation by Imperial forces in doubt. Somewhat symbolically, the main Imperial military base on Chosin has become the foundation site of the Ork capital settlement.
Its displaced and solid planetary core gives Chosin an erratic orbit.