During the Yuuzhan Vong War, the extra-galactic Yuuzhan Vong assaulted Orr-Om with a serpentine bioengineered monster known as the Ychna. Jedi Knight Anakin Solo managed to destroy the Ychna, though it was too late for Orr-Om which crashed into the surface of Duro. It was brought out of orbit by dovin basals, as were many other orbital cities.
- The New Jedi Order: Balance Point (First appearance)
- The University of Sanbra Guide to Intelligent Life: The Duros"—Star Wars Gamer 2 (Mentioned only) "
- The Complete Star Wars Encyclopedia