In the mirror universe, the Regent-class battlecruiser was a starship class used by the Klingon-Cardassian Alliance. The Regent-class was developed by the Klingon Empire and launched in the year 2372. Several ships of the class were in service to the Klingon Defense Force. (Mirror Universe - Shards and Shadows short story: "Family Matters")
- The Regent class is probably identical to the Qang-class with the exception of the name, being named Regent after the title of the Alliance's leader, rather than Chancellor.
In 2372, several Regent-class battlecruisers were prepared for launch. Their commanding officers had been chosen already, except for the IKS Gorkon. After uncovering a conspiracy, Commander Klag, son of M'Raq earned the favor of Regent Worf. Klag was promoted to captaincy and put in charge of the Gorkon. (Mirror Universe - Shards and Shadows short story: "Family Matters")
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