Near the end of the Cold War, an Imperial space station which orbited the planet was infiltrated by two traitors whom disabled it's defences. They were eventually neutralised, however the station was left defenseless which allowed a Republic fleet to attack it.[5]
Aeten II was later settled by the Galactic Republic, circa 1,000 BBY. Once the new inhabitants discovered the vast resources of stygium below the planet's surface, the world instantly became covered in stygium mines. In 22 BBY however, shortly before the Clone Wars, the Galactic Senate passed a law restricting the export of stygium crystals, although the supply of crystals had utterly came to a halt due to the over-mining of reckless profiteers. Nonetheless, prospectors found new resources to mine.
AT-ST surveying an abandoned mining facility on the surface.
During the last year of the Clone Wars, Aeten II was the site of the month-long Battle of Dreighton. Both the Galactic Republic, aided by the Pendarran Warriors, and the Confederacy of Independent Systems wished to capture the planet so that they could gain a significant advantage in the use of cloaking technology. Once the two factions attacked one another, however, Hutt and Black Sun forces entered the system and destroyed the remainders of all three fleets. It is believed that the Dreighton Nebula itself eventually annihilated all combatants.
Whatever occurred there, it would soon be declared that there were no more stygium caches on Aeten II. The aftermath of the battle also had many rumors about the nebula being haunted afterwards with ghost ships and the dead pilots of the battle, giving birth to the idea of the Dreighton Triangle. This was ratified by strange disappearances of ships flying in the nebula.
During the Galactic Civil War, after the destruction of the first Death Star, Grand AdmiralMartio Batch, wishing to recreate cloaking devices like the one used in the Sith Infiltrator, brought the Tarkin to Aeten II, where the Stygium mines had dried up. The Admiral then used the Tarkin to destroy the planet and used the large supply of previously unreachable crystals to forward the Phantom TIE project. The planet stayed intact and habitable but had gashes leading to the core. It was in orbit of the ruins of Aeten II that the Executor-class Star DreadnoughtTerror, under AdmiralSarn, protected the crystal supply.
Aeten II is present in the Empire at War story campaign, but not in the Forces of Corruption story campaign. This is consistent with the planet's destruction by the Tarkin superweapon after the Battle of Yavin. However, the planet appears in Forces of Corruption's galactic conquest mode unchanged, which is acceptable because this game mode is not meant to be taken as canon.