It was discovered by Rogue Squadron and recovered from Imperial control. The base, located along the edge of the Northern Dune Sea. The base dated back to Sate Pestage a high-ranking imperial official who lived in fear of being purged. He was put in charge of constructing the Eidolon, an experimental strike cruiser to advance the imperial war effort. Due to its being “barely space worthy“ and his paranoia, Pestage jumped the ship into oblivion without his superiors’ knowledge. He then used the continuing project funding to build the installation and purchase munitions, art, and wealth from across the galaxy. He entrusted Captain Marl Semtin to watch over it.
After it was emptied by the New Republic, a group of former Imperials took control of the base and used it as a shelter for those Imperial supporters who didn't want to make the trip to the remote systems of the Imperial Remnant. Over the years, the New Republic ceded the land on which the base was located to the Imperials, and Eidolon Base became a wealthy city unto itself.
- Star Wars: X-Wing Rogue Squadron: Battleground: Tatooine (First appearance)
- Star Wars: X-Wing Rogue Squadron: Mandatory Retirement (Mentioned only)
- Star Wars: X-Wing Rogue Squadron: Masquerade (Mentioned only)