Millius Prime was originally inhabited by the Diathim. During the Clone Wars, the Confederacy of Independent Systems invaded the moon and took it over. They set up a laser field to prevent anyone leaving the system, causing the planetary orbit around Iego to become home to a ship graveyard. The stranded inhabitants of Iego believed the laser grid to be the god Drol.
The Daithim's were a peaceful people as claimed by one of their own. When the Separatist drove the angels from their homes, Millius Prime was abandoned. When the 'ghost of Drol' was destroyed by Jedi Obi-Wan Kenobi and Anakin Skywalker, it is assumed the angels returned.