Unnamed D7 class starships The following is a list of unnamed Klingon and Romulan starships of the . By year . Interceptor near Organia . In 2267 , an unnamed Klingon warship was a warship sent to Organia by the Klingon Empire a prelude to invasion of that planet . On stardate 3198 , the vessel intercepted and attacked the upon entering the Organian ' s star system . After being hit by an unprovoked bombardment of magnetic pulse s , the " Enterprise " returned phaser blasts , completely destroying the Klingon vessel . ( ) Klingon invasion fleet . Following the declaration of war between the Klingon Empire and Federation , the Klingon fleet was spotted in the quadrant near Organia by Unit XY - 75847 . Soon after , eight Klingon space vehicles , led by Commander Kor , engaged the USS " Enterprise " , driving it away from the system before they assumed orbit around the planet to deploy their invasion forces . The two fleets were later prepared to engage each other outside of Organia , but were stopped by the Organians , who made all instruments of violence on both of the star fleet s radiate a temperature of 350 degrees , effectively ending the battle before it began . ( ) Confrontation near Capella IV . This unnamed vessel was a small class of Klingon scout ship / warship utilized by the Klingon Empire during the 23rd century . In 2267 a ship of this class transported Kras to Capella IV , so that the Klingon agent could acquire the rare mineral found there called topaline . The ship later lured the away from the Capellan homeworld in an attempt to bolster Kras ' position during negotiations , by first relaying false distress call s from the and . When the " Enterprise " returned to Capella IV , the warship attempted a brief stand - off , but ultimately yielded . ( ) Encounter at Neural . This unnamed vessel carried to the planet Neural in 2267 . The vessel was detected by the " Enterprise " arriving at Neural just as the " Enterprise " landing party was beam ing up to the " Enterprise " . Because the " Enterprise " was on the far side of the planet , the Klingon vessel did not spot the Federation ship , which was confirmed when the Klingon ' s routine message to their home base , which made no mention of " Enterprise " . To prevent detection by the ship , the " Enterprise " maintained radio silence , and after beaming a second landing party down , it left orbit to hide from the Klingon vessel until the " Enterprise " landing party could complete its mission . ( ) Pursuit in the Tellun system . In 2268 this Klingon battle cruiser , working in conjunction with Kryton , attempted to destroy the while it traveled through the Tellun system . After Kryton sabotaged the warp drive of the " Enterprise " , it was the job of the battle cruiser to strafe the Federation starship in order to persuade it into engaging its warp drive and destroy the ship . The ship was ultimately outmaneuvered by the " Enterprise " and limped back to Klingon territory . ( ) Capture of the " Enterprise " . Later in 2268 , two unnamed Romulan battle cruisers , and a unnamed Bird - of - Prey participated in the capture of the USS " Enterprise " after it crossed Romulan Neutral Zone . They would eventually be outmaneuvered by the " Enterprise " after it engaged a cloaking device stolen from the Romulan flagship . ( ) Encounter en route to Rator III . In 2269 , two unnamed Romulan battle cruisers intercepted the as it violated the Neutral Zone , while " en route " to Rator III . During a brief engagement , the " Enterprise " disabled the propulsion unit s of the lead cruiser , and the power supply of the second cruiser , leaving the crew unharmed . Following the engagement the Romulan cruisers to moved off , the latter , according to Spock needed several days to complete repairs . ( ) Mousetrap in the Delta Triangle . Later in 2269 , the ships , including the , were involved in a mouse trap maneuver against the USS " Enterprise " in the Delta Triangle . The commander of the lead sister ship was Commander Kuri , who contacted the " Enterprise " after witnessing what he believed to be the destruction of the " Klothos " , demanding their surrender . After refusing to surrender , the two sister ships fired on the " Enterprise " , only to lose it from their sensor s after it entered the region of space known as Elysia . ( ) Ambush of the " Enterprise " . In 2270 , three Romulan warships ambushed the " Enterprise " from behind a type 4 asteroid , just outside the Romulan Neutral Zone . They later pursued the Federation vessel deep into Federation space before retreating after failing to capture the ship . ( )