Defence of Patrak III

Defence of Patrak III was a xenocidal purgation campaign carried by the Corrosive Thorns upon the world of Patrak III when it was overrun by an unnamed Ork WAAAGH! in in the early centuries of M41.

History
On the planet of Patrak III the Chapter settled for a short period of time in order to built an operating base in case their homeworld was ever to fall. While building the base a horde of Orks landed upon the planet using ships made out of scrap. The orks swarmed the planet killing all servitors they could find before attacking the Marines of the Chapter. The Companies present fought bravely but they couldn't face the orks for much long. In the end all Astartes present were killed. At a later date the Chapter came back and annihilated each ork on the planet. The long dead marines were put to rest and the armor and weapons restored.