Yavin IV, or Yavin 4, is the fourth moon above the gas giant planet of Yavin. It was the site of an ancient Sith Temple in use during the Great Sith War, and the housing of the Massasi Temples. Hundreds of years later it was the location of the Rebel's secret base. Featuring the Rebel Base itself, and many ruins. Most of the moon is covered in jungle, including much of the ruins.