The Keldon-class cruiser was a class of Cardassian warship utilized by the Cardassian Guard during the 2370s. The Keldon hull was similar to the Galor-class spaceframe, with additions to the aft end and main body.

A number of warships of this type were also secretly constructed by the Obsidian Order in the Orias system in 2371. Built jointly with the Romulan Tal Shiar, these Keldon-class warships were fitted with cloaking devices, enhanced top speeds and weaponry. During an encounter with the USS Defiant, one of these vessels was heavily damaged by phaser cannon fire and six quantum torpedos. However, due to the fact the Defiant was heavily outnumbered, the attack ended abruptly.

These same Obsidian Order Keldons were used in the abortive attack on the Founders' homeworld later that year. Due to the Dominion's phased polaron beams mounted on their ships as well as their overwhelming numbers, the Obsidian Order's Keldons were destroyed with relative ease, along with the Romulan ships.

Production Base: Cardassia Prime Orbital 3 Assembly Facility
Accommodation: 500 plus flight crew and troops
Power Plant: One and possibly two M/A warp system; two or more impulse system
Length: 371.88 meters
Beam: 192.23 meters
Height: 70.13 meters
Mass: 2,230,000 metric tons (est.)
Armament: 8 or more spiral-wave disruptors, 1 large aft disruptor wave cannon
Performance: Warp 9.6 (observed)

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