If RTW it's Release that Witch, in my opinion, they have nothing to do with each other. If anything, in the two novels the territory is developed but little else.
This novel is VERY focused on recreating the past history of the Earth, especially the wars and especially China. If you are interested in this you will probably like it.
For all of those who live under a rock and don't know this novel and still need a push to read it, please go ahead and do it then jump to the manhwa version and lastly the anime version. Believe me you will not regret it! I wish the ranking was more representative to the value of this novel..
Popular Reviews
This novel is VERY focused on recreating the past history of the Earth, especially the wars and especially China. If you are interested in this you will probably like it.