Dreams of history are your feelings and attitudes that relate to the particular period of which you are dreaming. This dream may be assisting you in learning from your past.
If you are continuing to relive your history, then you need to heal the reoccurring issues in order to move on, create a future and to move in the direction of your dreams. See Mythology and Recurring Dreams.... Strangest Dream Explanations
Dreams of the past, or a dream about being in History class, are usually about learning from experience. Your mind could be trying to show you what worked or didn’t in the past, so you can learn a lesson, change your behavior and be happier in the present.... My Dream Interpretation