all i ask is a tall ship, and a star to steer her by
A Defiant-class starship is a heavily armored, limited-role Starfleet vessel developed at the Antares Fleet Yards in response to the Borg threat to the worlds of the Alpha and Beta Quadrants. The project was officially begun in 2366 by Starfleet's Advanced Starship Design Bureau (ASDB) under less then ideal conditions, as far as the accepted normal sequence of research, development, testing, and evaluation was concerned. Fortunately, a number of hardware innovations and design adaptations were already in the inventory and allowed for an acceptable level of reliability versus speed of systems integration and vehicle construction.
the defiant is stationed at deep space nine
Defiant-class vessels are constructed of standard tritanium and duranium alloys and composites. The bridge has been submerged within a larger Deck 1 than was envisioned for the pathfinder vehicle, and the entire vessel has been shortened to four decks plus allowances for crawlways and cable trunks. The notched forward hull has been equipped with a detachable pod consisting of the vehicle's main sensor and navigational deflector, airlock module, and a last-resort matter-antimatter warhead. The warp nacelles have been brought inboard to a minimum safe distance for field EM, and all EPS weapon-power conduits have been truncated to provide a nearly zero lag time between activation signal and beam launch.
All protected internal systems that require access to the vessel exterior are equipped with articulated or jettisonable hull plates, so that most of the familiar structures are hidden from view, including shuttlebay doors, docking ports, lifeboats, impulse vents, and consumables resupply connectors. An integral set of ventral docking clamps and landing pads had been designed into Defiant for possible ditching operations as well as for recoverable planetary landings. No practical demonstration has been attempted, though simulations indicate that if the impulse and reaction control thrusters are fully operational, a successful liftoff to orbital velocity is likely.
the defiant is the first warship build by the federation
The USS Defiant NX-74205 was one of at least three Federation starships to bear the name, and the prototype of the Defiant-class vessel. the Defiant-class was specifically designed to counter the Borg. Soon after the first vessel was completed however, a combination of a less urgent Borg threat and several design flaws caused Starfleet to suspend the project. Benjamin Sisko became intimately involved with the project while stationed at the Utopia Planitia Fleet Yards after the destruction of the Saratoga at Wolf 359. Early in 2371, as Federation-Dominion hostility escalated, the Defiant was taken out of storage and assigned to Deep Space 9 to protect the station from the Dominion, who had recently destroyed the USS Odyssey, a Galaxy-class starship. It was Starfleet's first true warship and had no provision for families or diplomatic missions, no science labs, no holodecks, or any of the other comforts of home. It was a heavily armored, stripped-down vessel that was created as a first strike vehicle for use in war, and incorporated the latest in Starfleet weaponry and defensive technology. As befitted its role, the U.S.S. Defiant was considerably smaller than most Federation starships. It had a normal operational crew of 40 people, but could accommodate up to 192 in emergencies. Work on the Defiant project began in 2366 after Starfleet was alerted to the threat of a Borg invasion. The ship also was granted special dispensation to carry a Romulan cloaking device. The Romulans loaned and allowed the limited supervised use of the cloaking device in the Gamma Quadrant only. In return, the Federation would provide the Romulans any and all intelligence data collected in the Gamma Quadrant about the Dominion.
Once the Defiant prototype had proven itself, Starfleet took the decision to put the Defiant-class into production. By the end of 2373, there were a significant number of Defiant-class ships in operation, and over the next two years they played a vital role in the Dominion war.
The Dominion War
The Defiant fought valiantly throughout the Dominion War and participated in the majority of its battles.
The ship was used in Operation Return to reclaim DS9 and stop the Dominion from the dismantling the minefield and bringing in its reinforcements from the Gamma Quadrant. After failing to stop the Dominion from destroying the minefield, the Defiant entered the wormhole in a vain attempt to stop the Dominion reinforcements. Captain Sisko convinced the Prophets to intervene and they destroyed the Dominion ships. They also made the wormhole impassable to any further Dominion incursions.
Several months after the Federation retook DS9, JemíHadar captured the Defiant while it was on a scientific mission to study a subspace compression anomaly. The Defiant was reclaimed, with the help of a runabout that had been shrunk to only a few inches long
Several weeks later the Defiant rescued the survivors of its sister ship the Valiant, which had been destroyed by the Dominion.
the defiant disabled by the breen energy dissipator
The Defiant participated in the First Battle of Chin'toka. The ship located and destroyed the power source for the Orbital weapon platform, thus helping the Federation Alliance to conquer the system.
The Defiant's short but illustrious life ended during the Second Battle of Chin'toka, when the ship was disabled by the Breen energy dissipator, and subsequently destroyed by Dominion weapons. Another Defiant-class ship, the U.S.S. Sao Paulo, was assigned to Deep Space Nine on Stardate 52861. Given the U.S.S. Defiant's exceptional record under Captain Sisko's command the Chief of Starfleet Operations gave a special dispensation to change the ship's name to Defiant. On this ship, the shield generators were completely reconfigured so that it would not be affected by the Breen's energy-dampening weapon. This new Defiant played a distinguished role in the final battle with the Dominion at Cardassia Prime, and remains stationed at DS9.