ISS Quantum

In the mirror universe, the ISS Quantum (ICC-40859) was a Terran Empire starship, a tactical escort in Imperial Starfleet service in the 25th century. 

History
In the year 2409, the Quantum was part of an Imperial fleet attacking Romulan Republic starbase Vauthil Station. A combined task force consisting of Starfleet, KDF and Romulan Republican Force defended Vauthil Station against the invasion fleet, closed rifts and activated relays to power up the station's defenses. The Allies were directed by Obisek. The invasion fleet was pushed back into the mirror universe by an anti-tachyon pulse from Vauthil Station.