Historical Fiction Definition

How wikipedia defines historical fiction

Historical fiction presents readers with a story that takes place during a notable period in history, and usually during a significant event in that period. Historical fiction often presents actual events from the point of view of people living in that time period.

In some historical fiction, famous events appear from points of view not recorded in history, showing historical figures dealing with actual events while depicting them in a way that is not recorded in history. Other times, the historical event complements a story's narrative, occurring in the background while characters deal with events (personal or otherwise) wholly unrelated to recorded history. Sometimes, the names of people and places have been in some way altered. As this is fiction, artistic license is permitted in regard to presentation and subject matter, so long as it does not deviate in significant ways from established history. If events should deviate significantly, the story may then fall into the genre of alternate history, which is known for speculating on what could have happened if a significant historical event had gone differently. On a similar note, events occurring in historical fiction must adhere to the laws of physics. Stories that extend into the magical or fantastic are often considered a historical fantasy.