|Affiliation:|| Klingon Empire;|
Klingon Defense Force
|Armaments:||Photon torpedo launcher|
|Defences:|| deflector shields;|
In 2151, the Vulcan diplomat Tos claimed that the Klingons would have sent a squadron of warbirds to attack Earth, had he not negotiated for the transport of Klaang's corpse to Qo'noS on the Enterprise (NX-01). (ENT episode: "Broken Bow")
In 2258, in the alternate reality, Cadet Uhura heard a transmission that forty-seven Klingon warbirds had been destroyed by a single Romulan ship, which was later identified as the Narada, when it attacked a Klingon prison planet.
During the same year, Klingon warbirds were also part of the Kobayashi Maru scenario. These simulated Warbirds were capable of cloaking, had shields, and were armed with photon torpedoes. During James T. Kirk's third attempt at the scenario, two of five of these vessels entered the neutral zone before locking weapons on the USS Trainer, captained by Kirk. Moments later, the three other warbirds decloaked while targeting the Starfleet craft, and then began firing torpedoes as they simultaneously maintained shields. After the simulation was affected by a subroutine that Kirk had secretly inserted, the shields of the warbirds were suddenly eliminated, and the Klingon vessels were all vulnerable to a single photon torpedo strike each. (TOS movie: Star Trek)