The Pacithhip were discovered before 1000 BBY, in the days of the Galactic Republic. The Corellian Run trade route eventually reached Shimia, and the Pacithhip gained access to galactic-standard technology. Pacithhip colonists reached faraway planets; for example, by 35 BBY, Mos Espa on Tatooine boasted a significant Pacithhip population, many of whom were animal breeders. After the rise of the Galactic Empire, Imperial troops took over Shimia's spaceports and discouraged offworld travel but otherwise left the Pacithhip alone. The Imperial defeat at the Battle of Endor in 4 ABY freed the Pacithhip to once again spread throughout the galaxy.