Hello, @lordkingpotato! It's rare to see accurate adaptations of historical facts or different cultures, honestly, I think you shouldn't focus so much on that, since it's a fictional story.
This manga looks quite interesting. In Hive-Con we always welcome posts about manga/anime and in general any kind of content that falls within the geek-otaku theme.
We'll be happy to have you there 💜💜
True but it would be worth it to find a piece that is both historically accurate and entertaining.