So got the dark vengence and the dark imperium sets. Kept the chaos guys and now would like to know the lore behind it. Dark vengence has chaos space marines? Right? I googled it but it's pretty confusing still. I was also talking to someone in GW and they said the nurgle in the dark imperium are actually technically called chaos space marines? Called the death guard? If someone could get me the specific names of both chaos armies from the sets and maybe a lore for dummies link or something that would be awesome. If like to know more about the four chaos gods? I just picked up the chaos Index today if this will help........

Edit: more info