Unnamed Klingon Birds - of - Prey The following is a list of unnamed Klingon Birds - of - Prey . By year . Three Klingon warships . In 2366 , these Klingon warships , lead by the IKS " Bortas " , assisted the in confronting two Romulan warbird s . ( ) Rendezvous with the USS " Enterprise " . In 2366 , an unnamed Klingon Bird - of - Prey rendezvoused with the " Enterprise " - D so that Kurn , a participant in the Officer Exchange Program , could be beamed aboard the Federation flagship . ( ) Attack on the " Bortas " . In the final days of 2367 , two unnamed Birds - of - Prey , loyal to the House of Duras , engaged a surprise attack on Gowron ' s flagship , the , as it orbited Qo ' noS , disabling its warp coil s and aft shields with the first volley . It was soon joined by a second vessel , and both continued to inflict heavy damage to the " Bortas " . At a suggestion from Lieutenant Worf , the " Bortas " lured the attacking ships into attempting to board , believing the " Bortas " crippled , while Worf targeted the disruptor s manually . This succeeded in destroying one of the ships , however the other managed to raise its shields in time , allowing it to cause further damage until it was at last driven off by the sudden appearance and attack from the . The attack signaled the beginning of the Klingon Civil War . Fortunately , the swearing of loyalty from Kurn and four other squadron commanders ensured that Gowron would not stand alone in the war . Because of Worf and Kurn ' s actions in the battle , Gowron would restore family honor to the House of Mogh . ( ) Skirmish at Ligos VII . This Klingon Bird of Prey was one of two acquired by a group of Ferengi Renegade ' s lead by DaiMon Lurin . In 2369 DaiMon Lurins Bird of Prey and it ' s sister ship attacked a Starfleet science station , which had a complement of 103 personnel , on the planet of Ligos VII . Both ships later took part in the attack on the Federation starship USS Enterprise D . The Enterprise was able to inflict only minor damage on one of the attacking ships . The Ferengi boarded and captured the crew and beamed them onto Ligos VII to mine it . DaiMon Lurin and his men were eventually arrested when the Enterprise ' s away team ( Who were turned into children ) were able to recapture the Enterprise . DaiMon Lurins Bird of Prey and it ' s sister ship were presumed to have been towed away . ( TNG : " Rascals " ) Attack on the " Prakesh " . These starships , composed of several Birds - of - Prey and a cruiser , attacked the Cardassian starship , the " Prakesh " , in early 2372 . One of the Birds - of - Prey were destroyed and another disabled by the , but the third destroyed the " Prakesh " with the help of the " Vor ' cha " cruiser . The two surviving ships later pursued the " Defiant " to Deep Space 9 , where they participated in the attack on the station . ( ) Encounter near Ty ' Gokor . In early 2373 , this Bird - of - Prey was encountered by Gul Dukat in his commandeered Bird - of - Prey while transporting Captain Benjamin Sisko and his crew on a covert mission to Ty ' Gokor . When the holofilter Dukat normally used to impersonate a Klingon captain failed , Worf offered to speak with them . Dukat , however , chose to fire on the other Bird - of - Prey , destroying it . ( ) Ty ' Gokor fleet . These starships , again Birds - of - Prey and " Vor ' cha " - class cruisers , were among those that protected Klingon High Command at Ty ' Gokor . ( ) Gowron ' s fleet . On stardate 50564 . 2 several unnamed Klingon Birds - of - Prey were among the large contingent of Klingon warships that arrived at Deep Space 9 after falling back from Cardassian space , following the Cardassians declaration of joining the Dominion . Several more later arrived at DS9 , and were among the last of Gowron ' s fleet to reach the station . ( ) Second Fleet . In late 2373 , several unnamed Klingon Birds - of - Prey belonged to the Second Fleet . While the Dominion attacked Deep Space 9 , during the second Battle of Deep Space 9 , several of these vessels crossed the Cardassian border and destroyed the Dominion shipyard s on Torros III . These ships later joined with the and , following the evacuation of DS9 , for a counterattack against the Dominion forces . ( ) Operation Return . This fleet , comprised of Birds - of - Prey and " Vor ' cha " - class cruisers , was led by Martok and Worf , after they persuaded Chancellor Gowron to contribute them to Operation Return . One of these Birds - of - Prey was destroyed by friendly fire . The ships turned the tide on the battle and managed to outflank the Dominion , opening a hole through their lines for the Federation fleet . ( ) Alternate timeline . Klingon - Federation War scout . In an Alternate Timeline on stardate 43625 . 2 this Klingon Bird of Prey decloaked and attacked the USS Enterprise C . The Enterprise C ' s sister ship the Enterprise D tries to distract the attacking Klingon ship but it continues it ' s attack before decloaking to report it ' s discovery of the Enterprise C . Captain Rachel Garrett is killed in the aftermath of the attack . ( TNG : " Yesterday ' s Enterprise " ) Klingon - Federation War attack group . " " Attention all hands . As you know , we could outrun the Klingon vessels . But we must protect the " Enterprise " - C until she enters the temporal rift . And we must succeed ! Let ' s make sure that history never forgets . . . the name . . . " Enterprise " . Picard out . " " These three Klingon " K ' Vort " - class battle cruisers are part of a patrol that were ordered to intercept and attack the two Federation starships Enterprise C and D . The Three " K ' Vort " - class battlecruisers attack the Enterprise D near the Temporal Vortex while the Enterprise C heads towards the Vortex . Only one of these Klingon ships is destroyed by the Enterprise D while protecting the Enterprise C . The two remaining " K ' Vort " - class battle cruisers continued their attack on the now helpless Enterprise D damaging her . The timeline is restore once the Enterprise C makes it through the temporal vortex thus changing the timeline and ending the Federation - Klingon War . It is unknown what happened to the two remaining " K ' Vort " - class battle cruisers . It is likely they were erased from existence . ( TNG : " Yesterday ' s Enterprise " ) Mirror universe . Alliance cruisers . Two of these unnamed Birds - of - Prey were dispatched to , along with the Regent ' s flagship , to put down the Terran Rebellion in 2372 . ( ) Unspecified . Klingon - Borg encounter . While undergoing a neural link with the Borg Cooperative , ' s first officer Chakotay became aware of at least one , otherwise unspecified , pitched battle the Empire fought against a Borg cube of the same type that engaged Starfleet in the Battle of Wolf 359 in 2367 , and in which at least two unnamed Birds - of - Prey were involved . Like their Starfleet counterparts , the Klingon squadron fared little better , suffering substantial losses . ( )