Klingon prison planet

The Klingon prison planet was a planet claimed by the Klingons. It served as a prison for enemies and captives of the Klingon Empire.

In 2258, the Romulan mining vessel Narada from the 24th century of an alternate reality, commanded by Nero, attacked the Klingon prison planet. It then destroyed an armada of 47 Klingon warbirds. Those on the planet sent an emergency transmission relating the situation, which was picked up and translated by in the long range sensor lab at Starfleet Academy.