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Memory Beta, non-canon Star Trek Wiki
For the primary universe counterpart, see Breen Confederacy.

In the mirror universe, the Breen Confederacy was an interstellar state located in the Alpha Quadrant. In 2377, the Confederacy became a founding member of the Taurus Pact. (ST - Mirror Universe novel: Rise Like Lions)


At some point in the past, the Klingons unsuccessfully attempted to conquer the Breen a total of three times. (Decipher RPG module: Through a Glass, Darkly)

23rd century[]

In 2279, the Breen Ambassador to the Terran Empire Tren publicly complained about weapon and ship trades with the Cardassian Union.

During the Khitomer Conference in 2293, Senator Pardek told Terran Emperor Spock he predicted the Tholians to ally with the Gorn and oust the Terran colonies from the Taurus Reach within two decades. Spock replied the Tholians also planned for the Breen to seize all Terran territory from Izar to Vega. (ST - Mirror Universe novel: The Sorrows of Empire)

The long-standing rivalry between the Breen Confederacy and the Tholian Assembly ended with a nonaggression pact brokered by Bajor sometime in the 23rd or 24th century. (DS9 - Mirror Universe novella: Saturn's Children)

The Taurus Pact[]

Provided with executive powers by their respective governments, Thot Gor, Tholian delegate Azrene and Prefect Zogozin of the Gorn Hegemony formed the mutually beneficial Taurus Pact at the former site of Starbase Vanguard in the Taurus Reach.

Conflict with the Pact was a looming menace for the Klingons and the Cardassians, both of which tried to broker a truce in order not to face a two- or three-front war. When the Cardassian Union descended into madness-induced chaos, the Klingons worried the Breen and the Tholians might attempt to seize Cardassia.

In 2378, the Breen conquered the Cardassian planet Lazon II and threatened to move on Arawath.

Following the victory of the Terran Rebellion and the dissolution of the Alliance in 2380, the Terran Protectorate, the forerunner of the Galactic Commonwealth, was recognized by the Taurus Pact as a nascent state. In addition, nonaggression treaties were signed with the Klingon Empire and Cardassia. (ST - Mirror Universe novel: Rise Like Lions)


The Breen Confederacy was located in the Alpha Quadrant, bordering the Cardassian Union and the Terran Empire. (ST - Mirror Universe novel: Rise Like Lions, ST - Mirror Universe novel: The Sorrows of Empire)

Planets and systems[]


States in the mirror universe
treaty of alliance and mutual defense Galactic CommonwealthRomulan Star Empire
Taurus Pact Breen ConfederacyGorn HegemonyTholian AssemblyTzenkethi Coalition
non-aligned states Borg CollectiveCardassian UnionDominionFerengi AllianceGrigariKazon-OglaKinshayaKlingon EmpireTalarian RepublicThallonian Empire
defunct states Klingon-Cardassian AllianceTerran EmpireTerran RepublicTerran RebellionTerran Protectorate