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Breen (planet)
Breen Confederacy
Average Male Height:
168 cm (5 ft. 6 in.) to 198 cm (6 ft. 6 in.)
Average Male Weight:
81.6 kg (180 lb.) to 108.9 kg (240 lb.)
Average Female Height:
168 cm (5 ft. 6 in.) to 198 cm (6 ft. 6 in.)
Average Female Weight:
81.6 kg (180 lb.) to 108.9 kg (240 lb.)
Minimum Academy Age:
Life Expectancy:
Distinctive Features:
PRC Rated:
NPC Rated:

Thot Gor, representative of the Breen Confederacy (2375).

"Never turn your back on a Breen"

-A Romulan saying
Note: This is NOT a PC and NPC rated species.

The Breen are a reclusive, powerful, and warlike humanoid species, native to the planet Breen in the Alpha Quadrant.


Very little is known about the Breen. They are thought to be humanoid, as they appear to be of typical humanoid height and build, though Ezri Dax speculated that they had a wolf-like appearance, and xenologists speculated that the Breen could be a silicon-based lifeform. No one has seen the Breen outside of their sealed, refrigerated suits of armor; it is said that those who have did not live to tell of it. Since it had been reported that the Breen homeworld was a frozen wasteland, it was thought that the refrigerated suits were intended to keep them comfortable in warmer alien climates, though Weyoun once mentioned that Breen is "actually quite comfortable", leaving the purpose of their suits a source of speculation.

It was speculated that the Breen body may be composed of ammonia and gelatin, which are held together in freezing temperatures but evaporate in warmer temperatures. If this hypothesis proved true, they would likely have a skeletal structure but, as they have no blood, contain few organs. The internal structure of the Breen body is said to consist of layers of gelatin-filled chambers, with the gelatin serving a similar function to blood, as it transfers chemicals vital for bodily functions. Therefore, when a Breen sustains an injury, a layer of gelatin will clot around it and seal the wound, which will leave a scar if left untreated.

The Breen are often regarded as ruthless and devoid of humanoid compassion, a depiction that is augmented by their lack of blood. During the Dominion War, their unprecedented attack on Starfleet Headquarters was seen as a symbol of their ferocity. The Romulans have a saying: "Never turn your back on a Breen".

Like the Ferengi, the Breen were immune to telepathy. This resistance to telepathic intrusion had led many to speculate that the their brains were multi-lobed, thus preventing any such technique from working.

Revelation - Classified Most Secret

Star Fleet Intelligence successfully infiltrated Breen space in the 2380s and uncovered definitive and somewhat startling information relating to the Breen and their biology. Initially it was believed that the Breen were a single race; however the name Breen is a name taken on by the member species of the Breen Confederacy. It has been claimed that the individual races take on the singular name and the concealing uniforms in order to prevent any biases and prejudices to interfere with the development of their society. The uniform design has been designed to support the distinctive features of the individual races.

Society and Culture

The Breen commonly produce offspring at a very early age, at about the equivalence in physical growth of human 3rd grade children. The Breen entertain their offspring with nursery rhymes. Breen nursery rhymes can be made up of a heterophonic, five-line verse with an alternating tetrameter and pentameter structure. These are nonsensical phrases strung together because they rhyme (at least to the Breen). Some Breen music, which can accompany these nursery rhymes, is written on a Lyxian scale.

It is unknown if this means a young average age for known humanoid species, or if the Breen have children at an age that would be considered young among Breen.

Treatment of Prisoners

The Breen are known to use slave labor; and at least some of these slaves are captured in raids on other species. When the Breen were using Bajorans slaves to mine dilithium ore, there were always at least eight guards within the mines.

The Breen are very prudent when dealing with prisoners. When capturing prisoners, the Breen typically stun them from long range with their distruptors, rather than approaching them and risking close combat. When Worf and Ezri Dax were discovered by the Breen on Goralis while sleeping, the Breen used this technique to subdue them. The Breen feed their prisoners a diet of algae paste, as well as hang them upside down to ensure they cannot escape.

On board starships, the Breen typically send in three guards at a time when they wish to remove a single prisoner from a cell that is being shared with other prisoners. Worf's various attempts at escape always failed, including his attempt to persuade the Breen guards that Ezri was sick, as well as his attempt to short-circuit the door. When Worf attempted to attack the Breen guards, they used a type of neural truncheon to paralyze him. Even after he fell to the ground, partially paralyzed, two Breen guards continued to use the truncheons on him to ensure he would not get back up before two guards could remove Ezri from the cell. In another incident, Worf simply showed signs of anger towards Weyoun and was again shocked by the neural truncheon.

To extract information from captives, the Breen use cortical implants, despite the severe pain and damage it causes to the recipient.

Science and Technology

Given that most known humanoid species live on class M planets with an average temperature far above the supposed temperature of Breen, the Breen are largely thought to have had to develop refrigeration suits in order to co-exist with others. However, if the Breen homeworld is temperate as suggested by Weyoun, then their reason for wearing environmental suits, if they were environmental suits at all, is much more mysterious.

It should be noted that while Weyoun suggested the planet to have a more temperate climate, this may be a misguided opinion, as most other Alpha Quadrant species have suggested the Breen planet to be frozen over. It may also however be a testament to the Breen's counter-intelligence, or another example of the Vorta's common usage of being overly "diplomatic" in regards to those whom they feel might serve the Dominion's interests.

The Breen are known for their knowledge of sophisticated cold-storage units, summed up in Captain Benjamin Sisko's statement, "If anyone knows how to keep things cold, it's the Breen."

Breen warship

During the 2360s, the Breen were known for their development of organic technology, which they employed in the construction of their spacecraft. Some of their vessels were even believed to be fitted with cloaking devices. During the mid-2370s, Breen warships utilized energy dampening weapons.

The Breen are known to use type 3 disruptors, like the Romulans and Klingons. The Breen also manufacture a portable hand-held cannon, the CRM 114. It is designed to target moving objects and surface emplacements. It was among the weapons dealt by the Ferengi arms dealer Gaila in the mid-2370s.

The Breen make use of memory probing technology in the form of cortical implants and neural truncheons for subduing prisoners.

History and Politics

Shrouded in mystery, the Breen have been discovered to be one of the most underestimated races inhabiting the Alpha Quadrant.

Historically, the Klingons were among the first to discover the consequences of underestimating the Breen. During the Klingon Second Empire, Chancellor Mow'ga ordered an entire fleet of Klingon warships to invade and conquer the Breen homeworld. The fleet never returned and was never heard from again.

While the size of the Klingon fleet is unknown, it can be assumed that it consisted of a large number of ships, due to the fact the Chancellor intended on invading deep into Breen space and conquering the Breen home planet. This shows that the Breen were a force to be reckoned with long before the 24th century.

Even by the 24th century, much was still unknown about the Breen and their otherwise politically nonaligned government, known as the Breen Confederacy. The Federation, however, had limited knowledge of the Breen and was aware of Breen outposts located near a black cluster in 2368. In 2370, the Breen participated in a palio held at Deep Space 3, during which the Ferengi attempted to bribe the Breen pilot into throwing the race. In 2373, the Breen settlements on Portas V near the Demilitarized Zone dealt with the Maquis, supplying them with cold-storage units. It was noted by Ezri Dax in 2375, when captured by the Breen on a planet in the Goralis system, that they were a long way from Breen space.

Other species like the Ferengi had developed closer ties with the Breen by the late 24th century, as both species conducted trade negotiations in 2373.

Breen privateers during the 24th century would often conduct indiscriminate raids against other Alpha Quadrant species. This includes the Breen attack and capture of the Cardassian transport Ravinok in 2366. The survivors of that attack were used for slave labor in the Breen operated dilithium mines on Dozaria. In 2368, Star Fleet feared the Breen might have attacked the science vessel SS Vico. Breen privateers also raided the Bajoran colony of Free Haven in 2372; they were, however, successfully driven away by the USS Defiant (NX-74205).

Alliance with the Dominion

In 2375, the Breen moved from a policy of low-level hostilities toward other major powers to one of open warfare when they allied themselves to the Dominion. They were then allowed access to the Dominion military database. According to the terms of the alliance, the Breen Confederacy received several planets in the Cardassian Union as compensation for joining the war.

The Breen may have been influenced to join the Dominion by a Founder impersonator in the Confederacy's government, as an unidentified Breen was seen in Internment Camp 371, where several people replaced by Founders were placed.
Remains of San Francisco after the Breen Attack - During the Dominion War

Shortly after joining with the Dominion, the Breen attacked Star Fleet Headquarters on Earth in the raid on San Francisco. A short time later they assisted the Dominion forces in breaking the lines at Chin'toka. Under orders from the Female Founder they allowed the escape pods to carry the Federation survivors to safety. This major battle, known as the Second Battle of Chin'toka, was won by the Dominion thanks to a unique Breen weapon, a form of energy dampening weapon system which could completely drain all the main power systems of a starship. Both of these defeats dealt a huge blow to the allies' morale. The only ship immune to the Breen weapon was a Klingon Bird-of-Prey, which serendipitously survived thanks to an adjustment the main engineer had made to the ship's tritium intermix in the warp core.

Although the Klingon fleet was able to make the needed adjustments against the weapon, the Federation and the Romulans were still unable to defend against the Breen. When the Federation finally did create a defense against the energy-dampening weapon, they forced the Dominion fleet to retreat. Breen Thot Pran expressed an extreme distaste of surrender, and would require the reassurance of the female Founder that they were not surrendering, but instead regrouping and attempting to redouble their shipbuilding and replenishment efforts.

With the necessary counter measures to the Breen's energy dampening weapon obtained, the Federation Alliance was able to go on the offensive once again, choosing to invade Cardassia Prime itself. In hopes of boosting the Breen's will to fight, the Female Founder offered them control of Earth and Romulus if they succeeded in winning the battle. During the Battle of Cardassia, the Breen were still able to inflict major casualties on the allies, even without the use of their energy dampening weapon. Up to a third of the entire allies' fleet was destroyed during the battle, including the Romulan flag ship. The Breen continued to fight with the Dominion until the end, demonstrating a willingness to die for the cause that matched that of the Jem'Hadar. However, when the Cardassian forces switched sides mid-battle, the Dominion and Breen were forced to withdraw to Cardassia Prime. After Odo convinced the Female Founder to surrender, the Dominion War ended. As a member of the Dominion, the Breen leaders were present during the Treaty of Bajor.

This information taken from Memory Alpha