This is my current project and more posts will be coming in this category as I progress through the models I plan to build.
Army background.
Nurgle is the Chaos God most directly involved with the plight of mortals, particularly Humans who suffer so acutely from a fear of death, perhaps the oldest fear of that species, or any other. While Nurgle is the god of death and decay, it is also the god of rebirth. Decay is simply one part of the cycle of life, without which no new life could grow. In the same way, Nurgle is also the god of perseverance and survival. While those who wish to spread decay and corruption are certainly amongst its followers, there are also those who wish to endure, to become resilient enough to handle the difficulties and opportunities presented by an uncaring universe. Many of those affected by Nurgle’s poxes usually turn to the god in order to escape the pain and sheer despair caused by sickness and disease.
I really like this idea of the cyclic nature of live, however as the third awakened chaos god, Nurgle’s armies are still pitted against the armies of the Imperium. Those humans or marines that accepts Nurgle’s gift are embraced and become part of the army as Pox Walkers or Plague Marines.