Eleven years before the Battle of Yavin, the Ultimatum was deployed to Gorse to assist Count Denetrius Vidian in mining thorilide. Following the Gorse conflict, the Ultimatum was placed under the permanent command of Rae Sloane from its previous commander, Captain Yale Karlsen, who was on a construction committee during the conflict.
- "Bottleneck"—The Rise of the Empire (Mentioned only)
- A New Dawn (First appearance)
- "The Levers of Power"—The Rise of the Empire (Mentioned only)