The Fortress of Axion was a Colicoid corporate fortress on Axion, believed to be impenetrable. After the end of the Dark Reaper campaign of the Clone Wars, the Colicoid who designed the protodeka was imprisoned within the Fortress. In the Battle of Axion, a clone trooper force under Commander Brolis was sent to capture the scientist; only Brolis survived to reach the stronghold. After calling for reinforcements, Brolis waited while Grand Master Yoda fought his way past a Hailfire droid to reach him.
- Duel (First appearance)