After Arcann's successful campaign through Republic and Imperial space, he deployed massive battle stations orbiting the planets he most wanted under his control. These Star Fortresses are powered by Sun Generators capable of venting their excess plasma onto the planet below. The threat of instant devastation holds the world populations hostage and serves as a warning to any who might attack the fortress.
Every enslaved world has its own tale of life under the oppressive shadow of a Star Fortress. Some blame the stations for spreading blight and disease through the environment; others have stories of friends incinerated from orbit for daring to speak their minds about Arcann or Zakuul. True or not, freedom will never be restored to the galaxy until Arcann's Star Fortresses are all destroyed.