The Facet Test Site, a military installation of the Galactic Republic, resided on the distant world of Eredenn Prime. Situated in proximity to Eredenn Station, this site, together with the Shard Test Site, served as a testing ground for the clandestine Decimator weapon. During the period of the Clone Wars, the Facet Test Site suffered an attack and subsequent destruction at the hands of Separatist General Sev'rance Tann.