Though he was a Galactic Marine, it is not known if BO-661 ever served the Galactic Republic during the Clone Wars. Regardless, sometime after 0 BBY BO-661 resided the Imperial Detainment Facility in the Imperial Fortress on Yavin 4. In this facility, the Empire imprisoned six Rebel pilots. During the Remembrance Day festivities of the same year, Wedge Antilles employed a loyal Rebel to rescue the pilots. The Rebel killed BO-661 so that one of the Rebel pilots could sneak out of the base in his Marine armor.
- Star Wars Galaxies: An Empire Divided (First appearance)