Ilum

Ilum is the ice planet home to many of the Adegan crystals used in the construction of Jedi lightsabers. The Sith Empire launched an assault on Ilum during the Cold War. The Republic and the Jedi both were unable to launch an effort to retake the planet, and resistance against the Empire on Ilum remains minimal. Originally, it was thought that the Sith invaded Ilum to deny the Jedi of their lightsaber crystals, however recent evidence has surfaced suggesting the Empire is using the crystals as a power source for a dark and terrifying new weapon that may tip the balance in favor of the Sith.