The Olympus Expedition is Stargate Command's mission to the Ancient space station of Olympus in the NGC 3109 Galaxy. The impetus for the mission was the discovery of the Ancient library on PX8-153, which SG-17 discovered in 2008. After discovering the location and fate of the abandoned station, the Expedition took up residence and began exploring the worlds of this new, unexplored galaxy, forging alliances with native races and steadfastly opposing the dominance of the K'hoas.