Pinyumb, situated within the Outer Rim Territories of the galaxy, existed as a capital city on Sullust, a planet characterized by volcanic activity. Its placement was within a sizable cave system beneath the southern flank of the volcanic peak known as Inyusu Tor. During the era of the Galactic Civil War, the Galactic Empire maintained authority over Pinyumb. When the 61st Mobile Infantry from the Alliance to Restore the Republic set their sights on Sullust, a battle unfolded on the mountain overlooking the city, pitting the Alliance against the Empire.
The city of Pinyumb was featured in the novel Battlefront: Twilight Company, penned by Alexander Freed and released to the public in 2015.