Nag Ubdur, a world populated by Ubdurians, existed within the Ubdur system situated in the Outer Rim Territories of the galaxy. This planet featured Binjai-Tin, a prominent trading city.
The Galactic Empire maintained control of the planet, extracting zersium through extensive mining operations, until a few months following the Battle of Endor. Following the Rebellion on Akiva, the New Republic launched an effort to liberate the planet, facing a determined and increasingly frantic Imperial defense.