It doesn't matter whether a sequence of words is called a history or a story: that is, whether it is intended to follow a sequence of actual events or not. As far as its verbal shape is concerned, it will be equally mythical in either case. But we notice that any emphasis on shape or structure or pattern or form always throws a verbal narrative in the direction we call mythical rather than historical.
-- Northrop Frye --
Have a great Frye-day!