Also known as the Natural world, Gaea is the central plane in the Bloodlines campaign. It is a small world, and the lack of available territory makes war frequent. Gaea is also a young world, only about 5,000 years old. The most recent major event in Gaea’s history is the Deserter’s War, which took place 103 years ago between Carlen and Thorren.
Planar travel is difficult in Gaea, and although a skilled mage can get to the Feywild or Shadowfell without much trouble, the barrier between the Natural World and the Astral Sea has only been broken once (during the Great Infernal War), and nothing from the Elemental Chaos has ever gotten through.