The obliteration of Aeten II happened in 3 ABY, a short time after the Battle of Hoth. Imperial Grand Admiral Martio Batch employed the superlaser of the still-being-built Empire's Tarkin superweapon to completely destroy the planet Aeten II. This action resulted in the release of millions of the planet's stygium crystals into open space; Batch then made use of these crystals to reconstruct the stygium screen cloaking device, a technology that had been entirely lost to the galaxy.
- " Who's Who: Imperial Grand Admirals " — Star Wars Insider 66
- The New Essential Chronology
- The Complete Star Wars Encyclopedia , Vol. III ("stygium crystal")
- The Essential Atlas
- The Essential Guide to Warfare