Defiant class

The Defiant class was a type of Federation starship in use in the 24th century, the first starship Starfleet ever created purely for warfare, though officially identified as an escort.

Class History
The Defiant class was one of many new Starfleet classes developed in response to the Borg threat following Starfleet’s tragic losses in the Battle of Wolf 359. The class was the first Starfleet ever developed purely as a warship but following the Borg's early incursions the expected Borg Invasion never materialised and the prototype USS Defiant spent much of its time in space dock in the Utopia Planitia Fleet Yards. Rising hostilities with the Dominion spurred the Defiant into full service and the USS Defiant was assigned to Deep Space 9 in 2371 and fitted with a Romulan Cloaking Device to defend the station from Dominion attack and conduct undercover operations in the Gamma Quadrant.

The Rifteon Warship
FHM Hellraiser (RDV-03) - This ship is the polar opposite of the Hellraiser, it was encountered in the Negitive Zone and is pure evil as discribed by its captain. Unlike the Parallel Universe these "evil"-personas cannot be made to convert to good and their ships seem to posses almost every weapon and defence known in this universe. This ship's prefix (FHM) means the Four Horse Men. This ship is polar because it is far more ruthless in battle than the Hellraiser.