>>21300642don't listen to fags recommending hh series, that was when they started to ruin 40k by modernizing it and filling in all the backstory (very reddit-style "we must remove all mystery and make youtube EXPLAINED videos")
read the book "space marine" and the old anthology "dark imperium" and the blurbs about lore from the old rulebooks
everything post hh is gay, it's ruined. 40k was fun when history was foggy because they lost it. we didn't need to know what happened, or if it even did. that uncertainty was part of the flavor