Unnamed D7 class starships

The following is a list of unnamed Klingon and Romulan starships of the D7 class.

By commander

 * Kang's battle cruiser
 * Kohlar's battle cruiser
 * Kuri's battle cruiser

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 USS Enterprise (NCC-1701) upon entering the Organian's star system.

After being hit by an unprovoked bombardment of magnetic pulses, 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 would be stopped by the Organians, who made all instruments of violence on both of the star fleets 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 USS Enterprise (NCC-1701) away from the Capellan homeworld in an attempt to bolster Kras' position during negotiations, by first relaying false distress calls from the SS Dierdre and USS Carolina (23rd century). When the Enterprise returned to Capella IV, the warship attempted a brief stand-off, but ultimately yielded. 

Encounter at Neural
This unnamed vessel carried Krell to the planet Neural in 2267.

The vessel was detected by the Enterprise arriving at Neural just as the Enterprise landing party was beaming 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 USS Enterprise (NCC-1701) 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 destroying 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 USS Enterprise (NCC-1701) as it violated the Neutral Zone, while en route to Rator III.

During a brief engagement, the Enterprise disabled the propulsion units 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 sensors 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 would later pursue the Federation vessel deep into Federation space before retreating after failing to capture the ship.