It was the location of a mine operated by Rim Commercial Mining, headed by a Gossam named Ja'Boag. Upon his arrival, the inhabitants of the planet were cast from their homes in the caves and forced to live outside. This endangered their lives, as the Day of Three Suns was fast approaching; without cover, everyone and everything on the surface would burn.
Moorjhone became the site of a battle between Darth Maul, Savage Opress and several Jedi investigating Ja'Boag's connection to Maul. After the battle, a wounded Maul was recovered from the desert and was convinced to lead an army of these residents against Ja'Boag, so that they could return safely to their homes. His intent, however, was focused solely on killing Ja'Boag and rescuing his brother, Opress.