ISS Saber

In the mirror universe, the ISS Saber (NCC-61900-B) was an Imperial Starfleet vessel in service in the 25th century.

In 2409, the Saber was part of an Imperial fleet consisting of five battle groups that took over a Federation starbase. These battle groups were defeated by ships Starfleet and the Klingon Defense Force, after which the Terran flagship attacked and was destroyed.