Reading history through a manga is perhaps the most entertaining way to learn about times past. Why aren't there more history mangas? There is no definitive answer to that question. However, whereas historical anime tends to embellish the details, manga do as well. They create fantasy stories with historical characters, but there is some merit to them. Historical mangas generally get the setting about right, but the story needs a bit of researching. It awakens a need to know about the actual lives of these characters. Anything that evokes a willingness to learn can't be bad.