Part 1: Genres
Section D: Historical Fiction
Unlike Science Fiction and Fantasy which can be split into multiple sub-genres, Historical Fiction is pretty much just one simple, complete genre.
Historical Fiction, like its name, tells a story about the past during an important and significant point in history such as a battle in a war, a discovery, an exploration, or anything else that has taken place. The main character is normally a fictional person, but can sometimes be a real person. Real historical figures also appear in these stories and interact at some point with the fictional characters.
Due to the fact that this is based on history, the author of a book in this genre
should stay true to history. If it doesn't, it is usually labeled "Alternate History" which is a Science Fiction genre.
Popular authors of this genre are - Mark Twain, Phillipa Gregory, Sir Walter Scott, Leo Tolstoy, and Louisa May Alcott.
Sorry that there isn't that much information, but since Historical Fiction isn't split into several genres, the information about what makes it that genre is less.