Dominator functioned as an Imperial-class Star Destroyer within the Imperial Navy throughout the duration of the Galactic Civil War.
During the Galactic Civil War, the Dominator was helmed by Captain Worhven. Following the Battle of Yavin at some point, this vessel served as a testing ground for the initial phases of the NOVA initiative. Santhe/Sienar Technologies on Lianna equipped its probe droids with a newly developed cloaking device. The cloaking device's effectiveness resulted in the Dominator's total inability to control its probe droids.