In 3058 the Cameron-class battlecruiser Dieron's Run was serving as the CGB Dieron's Run and was one of two WarShips assigned to the Clan Ghost Bear Naval Reserve, operating alongside the Black Lion-class battlecruiser CGB Bear's Den under the overall command of Star Commodore Elissa Snuka. By 3061 the Dieron's Run was the flagship of the Ghost Bear touman, and was attached to Alpha Galaxy. The Dieron's Run remained an active part of the Ghost Bear touman for the next six years; in May 3067 the Dieron's Run was involved in the second naval battle for Alshain, a Trial of Possession initiated by forces from Clan Nova Cat for the Leviathan-class battleship CGB Rasalhague, which was undergoing construction in the Alshain shipyards at the time.
The Trial was devastating for both sides, with half the Ghost Bear fleet destroyed and similar losses on the part of the Nova Cats; the Trial was initiated by the Nova cat Transcendent Naval Star, but the local commanding officer of the Ghost Bear naval forces refused the Nova cat batchall and ordered an immediate attack.
As the battle began a second Nova Cat Star, the Vision Naval Star arrived, while a second force of heavy Ghost Bear WarShips including the Dieron's Run began moving to support the Nightlord-class battleship CGB Ursa Major and her four-strong destroyer group. Star Admiral Leroux of the Transcendent Naval Star managed to convince the commander of the second Ghost Bear force that the Trial was a legitimate and honorable trial, effectively splitting the Trial into two separate naval engagements; as a result, the Trial didn't degenerate into a mass brawl, but it still devastated both the Ghost Bear and Nova Cat fleets. The Dieron's Run ended up duelling with two lighter Nova Cat WarShips, the Lola III-class destroyer SLS Faithful and the Aegis-class heavy cruiser SLS Bond. The two Nova Cat ships worked together, and while both were lost during the Trial, the Faithful forced the Dieron's Run to expose her flank to the Bond; as a result, while the Bond was already critically damaged, the crew of the Bond ensured that their last broadside destroyed the Dieron's Run, and the crew of the Bond were subsequently able to evacuate the dying ship and be rescued by other Nova Cat ships.
The Ghost Bears were the victors in the Trial, but the losses taken on both parts made the victory a pyrrhic one at best.
- Invading Clans, p. 38, "Clan Naval Reserve"
- Field Manual: Warden Clans, p. 86, "Naval Assets"
- Field Manual: Updates, p. 60, "Naval Assets"
- Field Manual: Updates, p. 81, "The Second Naval Battle of Alshain"