Campaign background help
So i am trying to write up my own campaign that a friend and I will play through. I want to write it out like the Imperial armour Taros campaign. So the Forces involved is the Dark Angels and Death Korps led by an Inquisitor still to be named vs The Farsight enclaves that will later be supported by the Eldar.
What i need though is a reason why Farsight would be in desperate need to colonize a planet
Does anyone have any suggestions?