The Koshagan People's Movement spent many years actively resisting the ruling class on the planet of Koshaga. This ongoing war saw intervention from the Galactic Empire circa 3 ABY, who quickly subdued the People's Movement and pursued the survivors across the Koshagan Lowlands.
The ruling class of Koshaga made an appearance in "Beyond Hope," a brief narrative penned by Michael Moreci and included in the From a Certain Point of View: The Empire Strikes Back collection from 2020.