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The 25th Century is a span of 100 Earth years that started in 2401. The current year, 2411, is set in this century, which will end with the year 2500. So far, the 25th century is marked by large-scale conflicts among Alpha and Beta Quadrant powers, as well as many power struggles initiated by the Iconians and their many voluntary and involuntary servitor races.

2401-2408[ | ]

This period covers the years immediately leading up to the start of the game.

2401[ | ]

2402[ | ]

  • A group of Klingon pilgrims attempt to kidnap Miral Paris and take her to fill her role as the Klingon Kuva'magh.
  • A group of Romulan officers opposed to the rule of Praetor Taris make contact with Sela and offer her their support for a rebellion.

2403[ | ]

USS Rapier

The prototype Starfleet vessel U.S.S. Rapier goes missing for six years after entering the Bajoran Wormhole.

2404[ | ]

  • The Klingons reinforced their claim to the Hromi Cluster, which was under Federation control. They demanded that all Federation assets, settlements and people be removed from the cluster within three months.
  • J'mpok informs the Federation that he is invoking ancient claims to the Archanis Sector, and that all Federation citizens must leave.

2405[ | ]

  • After their ultimatum elapsed, the Klingons invaded Korvat Colony in the Hromi Cluster and began to forcibly remove Federation civilians from planets in the cluster. Starfleet sends a fleet, establishing a blockade, and the war begins.

2406[ | ]

2408[ | ]

2409-2411[ | ]

This period covers the main in-game years for Star Trek Online.

2409[ | ]

Main article: 2409
D'Tan on New Romulus

Led by D'Tan the Romulan Republic establishes New Romulus as its new homeworld in 2409

2410[ | ]

Main article: 2410
Federation-Klingon cease-fire 2410

The armistice between the Klingon Empire and the Federation is declared

  • After a devastating Undine attack on both, Earth and Qo'noS, the Federation and the Klingon Empire declare an armistice, ending hostilities between the two powers. The Undine can later be convinced that it was the Iconians who deceived them into attacking the Alpha Quadrant powers in the first place.
  • The Iconians make their presence officially known to the Federation, the Klingon Empire and the Romulan Republic and soon begin an all-out war against them. The conflict ends in the nick of time in Earth orbit, when the World Heart - which was previously retrieved with Krenim time travel technology - was traded for peace aboard the Iconian flagship.
  • After a period of isolation, the Tzenkethi begin attacking remote systems in the Alpha Quadrant, using protomatter bombs to annihilate all life on the targeted worlds.
  • The final resting place for survivors of the U.S.S. Enterprise-C is discovered at a defunct Tal Shiar facility in the Pictae System. The only living survivor is an alternate timeline version of Admiral T'nae, who is reintegrated with her prime timeline counterpart soon after
  • Former Empress Sela is found and taken back into custody by the Alliance, and imprisoned at an undisclosed location.
  • Long thought to be dead, Martok is freed from captivity in the Briar Patch. He returns to lead his house as a General, helping in the Alliance war effort against the Tzenkethi forces.
  • The Nexus returns to the Alpha Quadrant.
  • The target of the Tzenkethi Crusades is revealed to be the awakening of the Hur'q. With the help of the Dominion led by Odo, the Alliance manages to defeat and cure them on Empersa, costing Dukan'Rex his life. The Dominion is then incorporated into the Alliance, removing their addiction to Ketracel as a condition.

2411[ | ]

Main article: 2411
  • The Excalbians force members of the Alliance to participate in trials, inadvertently creating a simulated Borg threat.
  • J'Ula's entry into the 25th Century caused a rift within the Klingon Empire over its direction and J'mpok's leadership, leading to a renewed Klingon Civil War. The Khitomer Alliance is dragged into the infighting.
  • J'mpok is exposed at his secret headquarters at Gorath and as a result, the Klingon Great Houses and the High Council are disbanded.
  • A clone of Chancellor L'Rell is reborn after a trip to Gre'thor, and she unites Klingons in the defense of Boreth from a new Fek'Ihri attack.

    L'Rell, new Chancellor of the Klingon Empire in 2411.

  • J'Ula duels J'mpok to the death in the Greath Hall during the final battle of Qo'noS and emerges victorious, but passes the Chancellorship to L'Rell instead.

External links[ | ]

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Chronology of Star Trek Online
The Path to 2409 icon
In-game years 225622572270240924102411
Periods Distant Past22nd Century23rd Century24th Century25th CenturyFuture
See also Chronology (overview)Original FictionPath to 2409/LoreThe Needs of the ManyLore BlogsTales of the WarPost War EraTime travelRomulan History