Erinnic was an Imperial II-class Star Destroyer of the Imperial Starfleet. It was commanded by Vice Admiral Ark Poinard from the days of the Empire, when it carried only TIE Fighters. His trademark send off, despite the anti-Jedi policies of the Empire, was "May the Force be with you!". The ship had a female officer in its command crew.
During the Battle of Ord Mantell, Erinnic led the fleet commanded by General Yald Sutel dispatched on the information of Elan that the Yuuzhan Vong would target Ord Mantell next. Ambushing the Yuuzhan Vong from behind the fifth planet, the rest of the fleet began the assault, waiting for the Erinnic to move out from between Ord Mantell's moons, forcing the Yuuzhan Vong command ship towards the Jubilee Wheel, and then out of the system.