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"Cardassian Struggle" ("Dominion Domination" to Klingon Defense Force characters) is an episode, i.e. a chain of missions, in Star Trek Online. It is available to all factions. The Federation version was originally considerably longer than that available to either the Klingon Empire or Romulan Republic.

In 2015 the story arc underwent a major redesign removing almost all of the old missions. of the old missions, substituting five cross-faction missions released with Season Eleven: A New Dawn on 27 October 2015.


Original version

The majority of the missions in the "Cardassian Struggle" episode deal with one of two storylines. The first primary storyline deals with the player faction's counterinsurgency efforts against the True Way under Gul Madred, which has secured an alliance with rogue Dominion forces remaining in the Alpha Quadrant after the end of the Dominion War. This culminates in the missions "The Long Night", where the player apprehends Madred on Empok Nor, and "The New Link", where the changeling Laas has set up a changeling sanctuary on Orias III and is breeding Jem'Hadar. The player destroys the hatchery and, with the blessing of the other changelings, takes Laas into custody after a ground battle.

The second primary storyline deals with a spate of incursions by the Terran Empire of the mirror universe, led by James O'Brien. The Terrans launch a number of attacks on the space around Deep Space 9 and are eventually revealed to have stolen the Orb of Possibilities from the prime universe and switched it with its mirror counterpart. This is not resolved in the KDF/RRF version, but the Federation mission "The Other Side" has the player switch them back and close off the Terrans' access for the moment.

The Federation player character has access to several additional missions, including a minor storyline continuing the Undine subplot from the "Klingon War" and "Romulan Mystery" episodes, and an altercation with Ja'rod, son of Torg and his ship the IKS Kang over the disposition of a tribble sanctuary.


Revamped version

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  • "Lost and Found"
  • "Spoils of War"
  • "Jabberwocky"
  • "The Factory"
  • "A New Link"

Feature episode: "Lost Dominion"

Main page: Lost Dominion

The plot then segues into the feature episode "Lost Dominion", which begins with an international conference on Deep Space 9 on forming a unified counter-force against the Borg Collective and was unaffected by the 2015 rewrite. This conference is interrupted by the appearance of 2,800 Dominion starships through the Bajoran wormhole, who swiftly occupy the station. They are discovered to be the fleet that the Prophets made disappear in 2374, and the player must ally with Dominion forces in the Gamma Quadrant and return to them the female Changeling in order to take back the station.




Federation episodes in Star Trek Online
Tutorial (DSC) Graduation DayRoutine ManeuversTrial by FireThe Shadow KnowsChildren of WarReporting In
Tutorial (TOS) I Sing of ArmsSearch and RescueBull by the HornsDislodging KlingonsThe Taurean AffairEarthward Bound
Tutorial Graduation DayTraining CruiseField PromotionsCommunication BreakdownAssimilation of the Innocent UFP emblem image. Seal of the Federation Starfleet
Agents of Yesterday Explore Earth SpacedockIn the Shadow of CestusPainful OmensReturn to BabelTangled WebsThe Battle of Caleb IV
(Tour of Duty) (Prelude to a Crisis) • (Khitomer Crisis) • (The Price of Liberty) • (Assimilation) • (Gather Equipment) • (Line in the Sand) • Welcome to Earth Spacedock • (Skills Trainer) • (New Orders?)
Klingon War Welcome to Earth SpacedockDiplomatic OrdersStranded In SpaceResearcher RescueSecret OrdersThe Doomsday DeviceThe Galaxy at Large • (Hide and Seek) • (Stop the Signal) • (The Kuvah'Magh) • (War is Good for Business) • (Treasure Trading Station) • (Task Force Hippocrates) • (The Ultimate Klingon) • (City on the Edge of Never) • (Past Imperfect)
Romulan Mystery Heading OutEmpress SelaDesperate MeasuresShadow PlayTaris • (Under the Cover of Night) • (Minefield) • (Divide et Impera) • (Saturday's Child) • (Preemptive Strike) • (Hunting the Hunters) • (Project Nightingale) • (By Any Means) • (Ground Zero) • (Ghost Ship) • (Friend of My Enemy) • (Trapped) • (S'harien's Swords)
Missions in parentheses are no longer available as of the current version of Star Trek Online.
Klingon Empire episodes in Star Trek Online
Tutorial End of WatchRed Alert!Intruder Alert!Challenge for Command!Your New CommandJourney to Qo'noS • (First City) Emblem of the Klingon Empire
Empire Duties of CommandThe Hunt is OnSpace ChaseManhuntFriend or Foe
Warzone Bringing Down the HouseThe House Always Wins • (Test of Mettle) • (Second Star to the Right, Straight on 'til Morning) • (Keep Your Enemies Closer)
Vigilance Mars, the Bringer of WarAlpha • (A House Pursued) • (House on Fire)
Fek'Ihri Return Blood of the EmpireDestinyAfterlife • (The Gates of Gre'thor)
Missions in parentheses are no longer available as of the current version of Star Trek Online.
Romulan Republic episodes in Star Trek Online
Tutorial A Day on the FarmA Day in the SunVirinat, InvadedFlight from Virinat Emblem of the Romulan Republic.
From the Ashes Explore the FlotillaThe HelixCrossroads at CraterisGasko BluesThe Search for New RomulusTurning PointNeutral No More
Allies The Price of NeutralityMemory LaneBigger PictureSmash and GrabTradecraft
In Shadows An Inside JobEnemy ActionSleepersCloak and DaggerRevelationMind GameTemporal Ambassador
Wasteland Secrets of NimbusThe Lost City of ParadiseBlind Men Tell All TalesThe UndyingA Fistful of GornInstallation 18
Vengeance Voice of the VoicelessAbductedSmall PackagesLast StandThe Best DefenseTurnaboutDevil's Choice
Freedom Toward FreedomThe VaultMine EnemyFrozenColiseumCutting the CordDarkness Before the Dawn
Spectres SpectresSkirmishSpin the WheelWhat Lies BeneathEverything Old is NewNight of the Comet
Cardassian Struggle Venture into Deep SpaceBadlandsRapierForging BondsThe Long NightCrack in the MirrorSeeds of DissentThe New LinkSecond WaveOf BajorOperation GammaFacility 4028Boldly They Rode

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