The CDS Diona was a Cardassian Union starship, a Keldon-class battleship in the 24th century, in service of the Cardassian Central Command around the year 2377. (ST video game: Armada II)
- No specific history or definitive final fate was established for this vessel as its name was selected for a battleship by the Armada II game developers, and is sometimes placed randomly when the ship appears.