(covers information from several alternate timelines)
(covers information from several alternate timelines)
By Starship or station
- The starship USS Voyager departs Deep Space 9 on a mission to find the Maquis raider Val Jean. Both ships are thrown seventy-five thousand light years into the Delta Quadrant by the Caretaker. The Caretaker's array, the only means home, is later destroyed by Captain Kathryn Janeway in order to protect the Ocampa and the two crews are forced to work together to find a route back to the Alpha Quadrant. (VOY: "Caretaker")
- Several crewmembers on Voyager, including first officer Cavit, flight control officer Stadi, the chief medical officer, and the chief engineer, are killed during the transit to the Delta Quadrant. (VOY: "Caretaker")
- Voyager makes first contact with the Ocampa, Talaxians, and Kazon. (VOY: "Caretaker")
- Neelix and Kes join the Voyager crew. (VOY: "Caretaker")
- Voyager approaches an M-class planet. Kes enters the bridge, reporting a vision of a planet being destroyed. She is relieved to find out that the planet is teeming with life. It appeared to be a pre-warp civilization, so Captain Janeway makes a note in the log and orders Voyager to continue towards the Alpha Quadrant. (VOY: "Time and Again")
- Originally, Voyager discovered the class M planet devastated by an explosion that happened the previous day due to the detonation of polaric ion energy. Captain Janeway and Tom Paris were thrown back in time before the explosion by a subspace fracture. The Voyager crew attempts to rescue them by opening a fracture with a polaric generator but cause the original explosion and destroy all life on the planet, including the captain. Janeway resets time by closing the fracture before it causes the explosion. This creates a new timeline in which Voyager never went to the planet and the civilization is spared. (VOY: "Time and Again")
- Voyager discovers a micro-wormhole. The crew sends in a microprobe, which reveals the wormhole leads to the Alpha Quadrant. Voyager, using the probe as a relay for a message, contacts a Romulan science vessel named Talvath, commanded by Telek R'Mor. However, it is later found out that the wormhole is a rift through time and that R'Mor is from the year 2351. After some consideration, R'Mor agrees to take the crew's personal messages with him and deliver them to Starfleet at the appropriate time. R'Mor is later discovered to have died in 2367 and the messages were apparently never delivered to Starfleet. (VOY: "Eye of the Needle", "Message in a Bottle")
- Voyager's Tom Paris is convicted of murdering the Banean Tolen Ren. After much evidence gathering, Tuvok is able to prove Paris' innocence and reveals a Numiri plot to steal Ren's technology. (VOY: "Ex Post Facto")
- Kes travels to this year from five years in the original version of the future. She attempts to give the crew of Voyager to the Vidiians in exchange for safe passage for her future and present self to Ocampa. Her plan fails and Janeway is forced to kill Kes. Kes then makes a holographic projection to prevent her future self from going back in time, thus changing history. (VOY: "Fury")
- Seska's true roots as a Cardassian spy are revealed. She betrays the Voyager crew and joins the Kazon. (VOY: "State of Flux")
- Ensign Samantha Wildman discovers she is pregnant while stranded on Voyager in the Delta Quadrant. (VOY: "Elogium", "Fury")
- Voyager lands on a planet in the Delta Quadrant and discovers a colony of Humans, including Amelia Earhart, transported to the planet by the Briori centuries prior. (VOY: "The 37's")
- Deep Space 9 is spared destruction by mere seconds after a legacy counter-insurgency program installed by the station's original Cardassian commander is inadvertently initiated. (DS9: "Civil Defense")
- The Maquis member Thomas Riker steals the USS Defiant and uses it to expose a Cardassian military buildup in the Orias system. (DS9: "Defiant")
- With help from Bareil Antos, Kai Winn and Legate Turrel sign the Bajoran-Cardassian Treaty. It sends political shock waves throughout the Alpha Quadrant. Bareil dies soon after. (DS9: "Life Support")
- The Romulan Star Empire sends Ruwon and Karina to Deep Space 9 to take possession of Starfleet's data on the Dominion. This was agreed upon earlier in the year, in exchange for allowing the USS Defiant to operate a cloaking device. The Romulans also send a Warbird, intending to destroy the station and the wormhole. However, their plan is thwarted by Miles O'Brien, who had foreseen the future and warned Benjamin Sisko. (DS9: "Visionary")
- The Cardassian Obsidian Order, together with the Romulan Tal Shiar, are lured into a trap when they attack the Founders' homeworld in the Gamma Quadrant. The following battle leads to the complete destruction of the combined Romulan-Cardassian fleet of twenty ships and severely cripples both organizations, which, in turn, reduces possible resistance against the Dominion down to the Federation and the Klingon Empire. (DS9: "The Die is Cast")
- The Bajoran Shakaar Edon, a former cell leader in the Bajoran Resistance, becomes first minister of Bajor's provisional government. (DS9: "Shakaar")
- Benjamin Sisko is promoted by Starfleet Command from commander to captain. (DS9: "The Adversary")
- It is discovered that the Founders of the Dominion have infiltrated the Alpha Quadrant. (DS9: "The Adversary")
- Kira Nerys speaks to Latha Mabrin for what will ultimately be the last time. (DS9: "The Darkness and the Light")
- Worf is promoted to lieutenant commander. (Star Trek Generations)
- The USS Enterprise-D is destroyed over Veridian III. Almost the entire crew survives in the vessel's saucer section after the ship's separation, which crash lands on the planet along with the attached captain's yacht Calypso after the ship's stardrive section exploded, impacting the saucer with an ion shock wave. (Star Trek Generations)
- The starship USS Equinox disappears, pulled into the Delta Quadrant by the Caretaker. The ship sets a return course to the Alpha Quadrant, but encounters the Krowtonan Guard, becoming severely damaged while losing half of its crew. (VOY: "Equinox")
- Starfleet introduces a new combadge, a gold rectangle with a cutout oval in the center replacing the gold oval. (DS9: "The Search, Part I"; Star Trek Generations; VOY: "Caretaker")
- The Federation, as well as the other Alpha and Beta Quadrant powers, becomes aware of the Dominion threat after the USS Defiant returns from its mission to the Founders' homeworld in the Gamma Quadrant, the home of the designated leaders of the Dominion. (DS9: "The Search, Part II")
- The Obsidian Order exposes Legate Tekeny Ghemor's ties to the Cardassian dissident movement. (DS9: "Second Skin")
- Robert Picard and his son René die in a fire at their home in La Barre, France. (Star Trek Generations)
- Dr. Tolian Soran uses a trilithium weapon: the solar probe to collapse the Amargosa star. (Star Trek Generations)
- Captain James T. Kirk emerges from the Nexus and is killed helping Jean-Luc Picard prevent Dr. Soran from destroying the Veridian system. (Star Trek Generations)
- Reginald Barclay transfers to Jupiter Station and works at Dr. Lewis Zimmerman's holographic laboratory to test the Emergency Medical Hologram's interpersonal skills. (VOY: "Projections")
- According to William Riker, the fusion reactor in the Uxbridge house would last until this year. (TNG: "The Survivors")
- Martok is captured by the Dominion on Kang's Summit and sent to Internment Camp 371. (DS9: "In Purgatory's Shadow")
- Tuvok joins Chakotay's Maquis cell as an undercover operative of Starfleet. (VOY: "Caretaker")
- Kar, a young Kazon-Ogla, begins his combat training on Tarok. (VOY: "Initiations")
- Sometime around this year, variable geometry pylons are introduced on Federation starships. (VOY: "Caretaker")
- The USS Olympia crashes on a planet in Rutharian sector. Captain Lisa Cusak's distress call is sent three years into the future by the planet's energy barrier and is intercepted by the USS Defiant. Captain Cusak dies on the planet. (DS9: "The Sound of Her Voice")
- Benjamin Sisko is killed by the Klingon-Cardassian Alliance. Miles "Smiley" O'Brien recruits the prime universe Benjamin Sisko to take his counterparts place temporarily. (DS9: "Through the Looking Glass")
- Smiley steals the design schematics for the USS Defiant during his visit to Deep Space 9. (DS9: "Through the Looking Glass")
- Jennifer Sisko defects to the Terran Rebellion. (DS9: "Through the Looking Glass"
- VOY: "Parallax"
- VOY: "Time and Again"
- VOY: "Phage"
- DS9: "Destiny"
- VOY: "The Cloud"
- VOY: "Eye of the Needle" (in part)
- Star Trek Generations (in part)
- DS9: "Explorers"
- VOY: "Jetrel"
- DS9: "Family Business"
- VOY: "Learning Curve"
- DS9: "The Adversary"
- According to her biography in Star Trek: Starship Creator, Sarita Carson graduated from Starfleet Academy in this year and was assigned to the USS Lexington as conn officer.
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