I don't know how far I've actually read since I read it online. I initially watched the anime for this and absolutely loved it, and it is still one of my favorite animes of all time, even if it differs greatly from the source material. But yeah, this is awesome, and so is the anime, but this has a lot more focus on the philosophy of war. In the anime, Tanya just seems to know about certain things like military tactics/strategy, but in this you actually see that she is actually just remembering the historical battles in her original timeline/world and applying that to whereshe reincarnated. You also see a lot more of the thoughts the characters have instead of just what they say, on top of more nuance in the development of the story. Read this, it's gud.