In the mirror universe, the Klingon-Cardassian Alliance was the dominant military and political power of the Alpha Quadrant, after its overthrow of the Terran Empire. The Klingons agreed to this alliance after the explosion of Praxis.


The key to such an alliance between these two nations was the Republic of Bajor, whose role as a power-broker ensured a level of equality that otherwise would not have been able to exist. The Alliance defeated and conquered the Terran Empire, already weakened by the reforms of Spock, and condemned all non-Alliance races and cultures to slavery. In 2370s, the Alliance was the dominant power in the Alpha and Beta Quadrant region. The Alliance suffered a set back in 2370 when the Terran Rebellion was formed by Benjamin Sisko. The rebellion continued to be a problem for the Alliance, successfully gaining and holding Terok Nor in 2372 and capturing Regent Worf in 2375.

While the Bajorans of the mirror universe have been influential members of the Alliance ever since the defeat of the Terran Empire, Kira Nerys has apparently been attempting to lead Bajor in rebellion against the Alliance. Her reasons for this are unclear, although it is most likely a simple power grab on her part.

Within the Alliance the Klingons held more political and military influence due to their Empire being the more powerful at the time of the Alliance's formation, many Cardassians were unhappy with the smaller influence they held and members of their government, such as Skrain Dukat have worked to increase Cardassia's power by gathering support with Bajor, the other influential member in the Alliance. By 2375 following the capture of Worf, Martok had taken over as Regent, the same year the Alliance scored a major victory over the Terran rebellion when they destroyed the Empok Nor shipyard and the 12 Defiant class warships being built there, a Romulan cloaking device was also captured.

Destiny timelineEdit

The Alliance continued to struggle with the increased might of the Terran Rebellion, and eventually the two organizations signed an armistice. Formerly Alliance-occupied worlds, such as Earth, were liberated from Alliance control. Furthermore, a neutral zone was established which kept the newly formed Galactic Commonwealth safe from the Alliance. The Alliance was officially dissolved in 2380.

Online timelineEdit

The Alliance continued to fight the resurgent Terran Empire at least as late as 2409. In that year a prime universe Starfleet vessel crossed into the mirror universe to retrieve the Orb of Possibilities from a Terran installation in the Arawath system and end an attempted inter-universal invasion by the Empire. Alliance forces under General B'Vat and Captain Ja'rod offered the Starfleet captain assistance against their common enemy, and aided in the success of the operation.

The Mirror Universe TrilogyEdit

In another permutation of the mirror universe, the Alliance was forged by Emperor Tiberius to conquer the Terran Empire following his ousting by his Prime Minister, Spock. No one else had thought that pairing possible, for while it was in the Cardassian nature to seek alliances, it was not a common Klingon trait, except under exceptional circumstances. In 2375 agents of the Alliance began replacing members of Starfleet and stealing designs of Federation starships in retaliation of what they believed was the Federation aiding the Terran Rebellion of their own universe through their possession of a Defiant-class ship. The Alliance's plans were foiled when Tiberius' agents compromised their operations in the Goldin Discontinuity.

Dark MirrorEdit

In another permutation of the mirror universe in which the Terran Empire survived well into the 24th century, the Alliance never existed and the Klingons had been conquered by the Terrans prior to 2367.


Alliance officers

Officers and soldiers of the Alliance

The military of the Alliance is made up of officers and soldiers of the Klingons, the Cardassians and the Bajorans. However, each clearly has the official enblem of the Alliance on their uniforms. Their weapons and uniforms are similar to those of "our" universe. The Bajorans wear in the mirror universe, a much darker and more pronounced military uniforms. Their main role is mainly in the task, the captured Terrans to monitor and ensure that their objectives are achieved without opposition. In disobedience they are just like their former Terran counterparts ruthlessly deal with those affected.

Alliance fleet

An Alliance fleet

The ships are available to them, at least in design and function the same as those of our universe. They are usually used for the individual sectors to protect the Alliance.

Hierachy of the AllianceEdit


The regent was usually the supreme commander of the Alliance. There are usually two regents, one for Cardassians and the other for the Klingons. The Cardassian regent usually acts as a governmental unit, while the Klingon regent governs the military, and any combative action.

Here are several known regents:


Intendant Kira 2371

Intendant Kira in 2371

Since the regent could not personally oversee every single sector within their regency, intendants were delegated to oversee each specific sector or, sometimes, a single planet.

Here are several known intendants:

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