Complex sentence: The Forest was not oak trees from horizon to horizon, in the Early Middle Ages, a forest was defined as a hunting area, there would some densely wooded areas, shrub land, parks of pastureland and areas of cultivation.
Split into simpler sentences: The Forest was not oak trees from horizon to horizon. In the Early Middle Ages a forest was a legally defined hunting area, with some densely wooded areas, shrub land, parks of pastureland and areas of cultivation.