"You can do quests for them, and gain popularity by the people. Unlike Morrowind, Oblivion is not a name of a province, but equivalent for hell. It is the place where all demons live, and where the dark lord comes from. The game itself takes place in the capital province of Tamriel, Cyrodiil, and possibly parts or all of Oblivion itself. You might think that the province or Cyrodiil is smaller than Morrowind, but the game’s landmass will be bigger than Morrowind."