USS Galaxy Timeline - From 2153 AD to 2199 AD


Credits: This timeline chronology was originally compiled by James Dixon. Modifications and additions by Liam Collins and Ian Dickson. Movie and episode summaries can be located here. Novel timeline by Geoff Trowbridge can be found here. Some liberties have been taken in aligning dates.

This timeline is used in conjunction with the USS Galaxy Email Fan Fiction Writers RPG as a reference guide. Ever feel like writing, but don't know where to start? we're a small group who love writing with each other to build an environment of our own. Kinda like a combination of Tabletop RPG's and Choose-Your-Own-Adventures. You're welcome to be a part of it. We're always looking for more writers.
2153
- The Federation vessel U.S.S. Carrizal makes first contact with the Rihannsu homeworlds. They receive no reply to standard friendship messages. The planets are designated Romulus and Remus, and the inhabitants are called "Romulans" [TOS 35: "The Romulan Way" - Rihannsu #2].
- The crew of Enterprise begins to suffer inexplicable fits of narcolepsy [Strange New Worlds VII: "Earthquake Weather"].
2153, Early January
ENT Episode "Judgment"
Captain Archer stands accused before a Klingon tribunal of conspiring against the Empire, and his only hope of escaping a death sentence or life in the dilithium mines of Rura Penthe is an aging and disenchanted Klingon lawyer with little energy or enthusiasm for the case.
2153, January 2
A change in government on Zantorus results in a militant faction coming to power that orders all off-worlders to leave the planet immediately or be placed under arrest [a few weeks prior to ENT: "The Breach" - exact date is speculation]
2153, January 7
The Denobulan Science Academy loses contact with its geological team on Zantorus [three weeks prior to ENT: "The Breach" - exact date is speculation].
2153, January 10 - 12
ENT Episode "Horizon"
- When Enterprise reverses course to go investigate a planetary phenomenon, Ensign Mayweather takes the opportunity to visit the cargo ship where he was born and raised, the E.C.S. Horizon. But his father, the ship's captain, just recently died, and Travis finds that things at home haven't been the same since.
- The Horizon resumes course to Deneva Colony.
- By this point, the Enterprise had visited 22 inhabited planets.
2153, January 21 - 25
ENT Episode "The Breach"
Enterprise is asked to evacuate a group of Denobulan geologists from a world that has been taken over by a militant faction, and since they are located deep underground, the effort requires some treacherous spelunking by the rescue team. Meanwhile Phlox faces a dilemma when another evacuee, an Antaran afflicted with a fatal dose of radiation, refuses to be treated by a Denobulan because of very old bad blood between the two races.
2153, February
ENT Episode "Cogenitor"
- In early February, the Vulcan ship Seleya enters the Delphic Expanse as is not heard from again. Nine months later, the Enterprise encounters the vessel, damaged and with a crew that has gone insane in December 2153 (nine months before ENT: "Impulse").
- While studying a star in the early stages of going supernova, Enterprise encounters a race called the Vissians. The two crews get along famously, until Trip Tucker gets a little too curious about a member of the species' third gender — a nameless individual called a "cogenitor."
- The Triannon homeworld is devastated by religious conflict (eight months before ENT: "Chosen Realm").
2153, February 25 - March 1
ENT Episode "Regeneration"
An arctic research team on Earth discovers debris from an alien vessel, nearly a century old, buried in a glacier along with the bodies of two cybernetically enhanced humanoids. Once those beings are thawed for investigation, they come to life and abduct the scientists and their transport vessel. Enterprise is called to intercept, but Captain Archer and his crew find these cyborgs to be an intractable, insidious enemy.
2153, March 10
ENT Episode "First Flight"
While Enterprise is investigating what appears to be a dark matter nebula, Archer receives news that A.G. Robinson, his old rival in the early days of the NX test program, has died. During a shuttlepod mission into the dark matter phenomenon, Archer reminisces to T'Pol about the time he and Robinson were pilots competing for the honor of being the first to break the Warp 2 barrier. (date speculation)
2153, March 18 - 21
- Captain Archer and Commander Tucker spend three days exploring an uninhabited planet [ENT: "Bounty"].
2153, March 21 - 24
ENT Episode "Bounty"
- A Tellarite bounty hunter captures Archer on March 21 intending to turn him over to the Klingons for a substantial reward. Meanwhile, T'Pol is infected with an alien pathogen that unleashes her primal Vulcan urges.
2153, Early April
The Vulcans send another vessel, the VonKara, out to find the Seleya. The crew are driven insane by the Delphic Expanse and re-emerge into normal space a short time after entering. Video of the maniacal Vulcan crew is shown to Captain Archer upon his return to Earth, after he has decided to enter the Expanse (ENT: "The Expanse", ENT: "Impulse").
- The NX-01 descendents on their own Enterprise fail to stop the Xindi probe from being launched. (depicted at the beginning of ENT: "E2")
2153 April 7 - August 21
ENT Episode "The Expanse"
A probe from an unknown alien source unleashes a devastating assault upon Earth. Enterprise is recalled, and along the way home Captain Archer acquires information that the perpetrators come from a region of space known as the Delphic Expanse — a place where very bizarre things happen, and from which few ships that enter ever return. Starfleet must now decide whether to risk sending the NX-01 into the Delphic Expanse to prevent a possible second attack.
2153, Late May
Kaitaama ascends the throne on Krios Prime (ENT: "Precious Cargo" plus 246 days).
2153, June
The Triannons' home planet is devastated in the final battle of a long religious war (8 months before ENT: "Chosen Realm").
2153, June 30
NX-01 Enterprise enters the Dephic Expanse in pursuit of the Xindi.
2153, August 15
ENT Season 3
ENT Episode "The Xindi"
Six weeks into the Delphic Expanse, Captain Archer and his crew learn of a Xindi working at a mining colony, and set out to track him down and gain information about the mysterious race. But when Trip and Archer get caught in a deadly trap, Enterprise 's newest crew members, a squad of Military Assault Command Operation soldiers (MACOs), must rush to free them. Meanwhile, T'Pol suggests an intriguing Vulcan cure for Trip's vivid nightmares of his sister's death.
2153, Late August
ENT Episode "Anomaly"
- The NX-02, the second Warp 5 starship, is launched from orbit around Earth. (14 months after the Enterprise is refit ENT: "The Expanse")
- The mission to find the Xindi takes a treacherous turn when Enterprise is crippled by inexplicable, destructive spatial anomalies that distort the laws of physics. With systems down, Osaarian pirates board the ship and and raid it of valuable supplies. The crew captures one of the marauders, and Archer's sense of morality is tested when he interrogates the prisoner.
2153, September
ENT Episodes "Extinction", "Raijin"
- Rescued by Archer from an alien bazaar, a captivating slave girl, Rajiin, uses her erotic, hypnotic mental powers on the crew to steal data on humans for her Xindi overlords. But when her deception is discovered, Archer throws her in the brig, forcing the Reptilian Xindi to storm the ship, weapons blazing, to spring her free. Meanwhile, Trip and T'Pol initiate a dangerous experiment to insulate the ship from further destruction from strange physical phenomena in the Delphic Expanse.
- Their ongoing quest for the Xindi leads the Enterprise crew to a tropical alien world where Archer, Reed and Hoshi are exposed to a highly contagious virus that transforms their bodies and minds into those of the long extinct alien inhabitants of the planet.
2153, October
ENT Episode "Impulse"
- Boarding a damaged Vulcan vessel adrift in an asteroid field, Archer and his team discover that the remaining crew have mutated into violent, zombie-like creatures. When T'Pol begins to succumb to the mutation, the crew must fight their way out before they lose her forever.
2153, Mid-October
ENT Episode "Exile"
From light-years away, a powerful telepathic alien, Tarquin, mentally contacts Hoshi and convinces Archer to let the ensign briefly visit his isolated planet in exchange for crucial information on the Xindi.
2153, Late October
ENT Episodes "The Shipment", "Twilight"

- After infiltrating a Xindi-Sloth plant that synthesizes vital explosive materials for the Xindi super-weapon, Archer, Reed and MACO Major Hayes capture and interrogate the plant foreman, Gralik, who upon learning of the Xindi council's attack on Earth, establishes an uneasy alliance with Archer.
- After Enterprise is assaulted by severe spatial distortions, Archer loses the ability to form new, long-term memories, causing him to wake up each morning unaware that any time has passed since the day he was afflicted. Despite the crew's best efforts to keep him involved in decisions, it becomes clear over time that they can't continue to function in this manner, leading T'Pol to become his caretaker and Trip to take command of the ship.

2153, November
ENT Episodes "North Star", "Similitude", "Carpenter Street"
- After finding thousands of humans on a Delphic Expanse planet living in settlements seemingly straight out of the Old West, Archer gets embroiled in a dangerous cultural conflict once he discovers that the humans are systematically oppressing the alien race that originally brought them to this world.
- After an accident in Engineering leaves Trip mortally injured, Dr. Phlox attempts to save the chief engineer by creating a "mimetic simbiot" -- a clone -- of him to harvest neural tissue from it. In its very short lifespan, the simbiot grows rapidly from baby to adult, and surprises the crew with detailed memories of the real Trip's life. Meanwhile, the accident has left Enterprise disabled and adrift inside a destructive space cloud, so the crew attempts to free the ship before they are stranded forever.
- Ex-crewman Daniels, a temporal agent from the future, appears on Enterprise and sends Archer and T'Pol back in time to 2004 Earth, to learn why three Xindi-Reptilians have been detected in the timeline where they're not supposed to be. Using 22nd-century technology, Archer and T'Pol scour Detroit, Michigan, and locate an abandoned factory where the Xindi are developing a biological weapon with the help of a local medical worker (Takes place 150 years after 2004. Note: The events in the episode that are set in 2154 take place over two days).
2153, Late November
ENT Episode "Chosen Realm"
- Enterprise NX-01 discovers a third sphere in the Expanse (just before ENT: "Chosen Realm").
- A Triannon crew which Enterprise rescues from a crippled ship turns out to be a group of religious extremists who hijack the NX-01 to eradicate the "heretics" on their homeworld. Furthermore, when the group's leader, D'Jamat, learns that Archer's crew has dared desecrate the Expanse's mysterious Spheres -- which the Triannons consider holy shrines of the "chosen realm" -- he demands that Archer choose a crewman to be put to death.
2153, December 3 - 8
ENT Episode "Proving Ground"
Andorian Imperial Guard Commander Shran and his warship track Enterprise down in the Delphic Expanse to offer Captain Archer help as an ally, and together, the two former adversaries plan to steal a prototype of the Xindi's planet-destroying superweapon. As a confrontation with the Xindi looms, Lt. Reed gets help fixing the NX-01 's damaged weapons systems from a striking Andorian female, Lt. Talas, a contentious officer with her own agenda.
2153, December 12 - 16
ENT Episode "Stratagem"
Having located the prototype of the Xindi superweapon, Archer and the crew manage to capture the weapon's creator, Degra, and launch into an elaborate scheme to dupe their prisoner into revealing the location of the final weapon under construction. With time running out before the Xindi discover Degra's disappearance, the entire crew play key roles in the massive charade which combines Archer's acting skills, Trip's faux alien shuttlecraft, Hoshi's decrypted data and Dr. Phlox's memory tampering, in order to trick the Xindi scientist into believing he and Archer are now allies and on the run after escaping a Xindi-Insectoid prison.
2153, December 27 - 30
ENT Episode "Harbinger"
- Enterprise encounters an abnormally large spatial distortion and rescues an alien from a craft trapped inside. While Archer and Dr. Phlox try to solve the mystery behind the rapidly deteriorating alien, tensions between Lt. Reed and MACO leader Major Hayes escalate into a full-blown brawl. Meanwhile, Trip's flirtation with a female MACO forces a surprisingly jealous T'Pol to confront her attraction to her fellow senior officer.
- Captain Archer agrees that the crew of the Enterprise should be put into a comatose state, in order to combat the effects of an approaching area of space on the human neuro-cortex. Dr. Phlox is left in control of the ship, as his Denobulan physiology is determined to be immune (two days prior to ENT: "Doctor's Orders").
2154 FIRST LYRAN-KLINGON WAR
- The First Lyran-Klingon War begins; no details are known.
- Military salutes go out of style [TNG Giant Novel 11: "Imzadi"].
- The Articles of Federation are signed at Babel. Participants include Earth, Andor and Rigel, but not Vulcan. Initially, this is merely an alliance, with planetary governments still retaining all of their sovereignty [TOS 16: "The Final Reflection", TOS 6: "The Abode of Life" and TOS 35: "The Romulan Way" - Rihannsu #2] [Note: This is ninety years prior to the events of TOS 16: "The Final Reflection". This is described as the "incorporation" of the U.F.P.—a term also used in Federation to describe the events of 2161. However, it is well established that a "Federation" existed in some form during the First Romulan War. In TOS: "Strangers from the Sky", the date is given as 2087, which contradicts TOS: "Metamorphosis" and ENT: Broken Bow].
- The Federation vessel U.S.S. Carrizal makes first contact with the Rihannsu homeworlds. They receive no reply to standard friendship messages. The planets are designated Romulus and Remus, and the inhabitants are called "Romulans" [TOS 35: "The Romulan Way" - Rihannsu #2].
2154, January 3
ENT Episode "Doctor's Orders"
While Enterprise travels through a section of the Expanse lethal to human neurology, Dr. Phlox must put the entire crew to sleep and handle all aspects of a working starship, but even with T'Pol's help, the doctor's skills might not be enough to keep the crew safe when complications arise. With the ship not moving out of the area fast enough, Dr. Phlox must figure out how to start the warp engines without blowing up the ship, while realizing he may not be entirely immune to the region's radiation himself. (date is speculation)
2154, January 8 - 12
ENT Episode "Hatchery"
When Enterprise stumbles upon a damaged Xindi-Insectoid ship on a barren planet, Archer and the crew search the ship and discover a cache of several dozen Insectoid eggs, but with the nursery's bio-support failing, Archer becomes fiercely determined to help his enemy's offspring hatch. As Mayweather and Tucker attempt to learn all they can about the alien ship, Archer becomes consumed with saving the Xindi hatchlings, causing the crew to start raising questions about Archer's judgment.
2154, Mid-January
ENT Episodes "Azati Prime", "Damage", "The Forgotten"
- The Enterprise finally arrives at the Xindi superweapon construction site, and despite a troubling glimpse into the future by time-traveling operative Daniels, a determined Archer leaves the ship in T'Pol's hands as he alone pilots a suicide mission to destroy the huge Earth-bound planet-killer. With Archer gone, T'Pol and the crew attempt to escape enemy territory undetected, but once discovered are forced to make a last stand against multiple Xindi attackers (date is speculation, episode takes place immediately after ENT: "Hatchery").
- After brutally torturing Archer, the Xindi unexpectedly return him to Enterprise, which is barely holding together after a devastating Reptilian attack. The captain receives information that some possibly sympathetic Xindi Council members are willing to meet with him, but he must make a rendezvous several light-years away in just a few days. Faced with a severely crippled ship with no warp drive — as well as numerous dead and injured crew members — Archer tosses his ethics aside in a desperate attempt to get the ship back on its feet. T'Pol confesses her addiction to Trellium-D (Immediately after "Azati Prime" and three months since ENT: "Impulse").
- After arriving at one of the mysterious, metallic spheres for a clandestine meeting with Xindi weapon designer Degra, Archer attempts to convince the skeptical scientist and another Xindi council member that humanity isn't their enemy. Meanwhile, as the crew struggles to repair the extensive damage to Enterprise, Trip must deal with the recent death of a member of his engineering team, forcing him to also come to terms with the loss of his sister in the original Xindi attack on Earth. Also, T'Pol must confront the implications of her emotion-provoking substance addiction (2 days after the attack in ENT: "Damage", nine months since the attack on Earth in ENT: "The Expanse").
2154, Late January
ENT Episode "E²"
- While on their way to face the Xindi Council, Archer and crew encounter a twin NX-01 manned by their own descendants, who warn that the subspace shortcut they intend to take will throw them 100 years into the past, ensuring Earth's destruction (immediately following ENT: "The Forgotten").
- Kolos is released from Rura Penthe (ENT: "Judgment" plus one year").
2154, Early February
ENT Episode "The Council"
- T'Pol and Reed lead a team on a harrowing mission into one of the mysterious metallic Spheres to obtain vital information about how the Delphic Expanse was created, as Archer and Hoshi approach the Xindi Council hoping that diplomacy can stop the launch of the superweapon aimed at Earth. Meanwhile, with Enterprise about to derail their plans to invade our universe, the transdimensional Sphere-Builders urge key members of the Xindi Council to take drastic measures to undermine the humans' peace overtures.
2154, February 13
ENT Episode "Countdown"
- Archer and his new allies among the Xindi Council attempt a full-scale assault on the superweapon being deployed toward Earth by the rebellious Reptilians and Insectoids, before a kidnapped and brainwashed Hoshi can decrypt the weapon's encoded arming mechanism and unleash its devastating power. Meanwhile, T'Pol and Trip hatch a plan to destroy a Sphere which they believe will disrupt the entire network of Spheres responsible for the Expanse's spatial anomalies, bringing the transdimensional "Sphere-Builders" directly into the fray. (date given, also Archer indicated it was nearly eight months since the Enterprise first entered the Expanse)
2154, February 14
ENT Episode "Zero Hour"
Aboard Degra's ship, Archer, Reed and Hoshi work with the Arboreals and Humanoids to chase the Reptilians and stop the Xindi Weapon from decimating Earth. Archer's plan is to board the weapon and try to overload the power systems, but he'll need the help of an ailing Hoshi to read the weapon schematics. Back in the Delphic Expanse, T'Pol leads the NX-01 in an attempt to obliterate Sphere 41 in hopes of disabling the entire network of Spheres. But the crew's time is limited, as that region of space has a degenerative effect on their bodies, and the furious Sphere-Builders try to tear Enterprise apart.
2154, February 20
ENT Episodes "Storm Front, Part I", "Storm Front, Part II"

- The Enterprise returns to Earth from Xindi space but is intercepted by Daniels and sent back in time to Earth in the summer of 1944 [ENT: "Zero Hour"].
- Having mysteriously survived the destruction of the Xindi superweapon, a battered Archer awakes to find himself back on Earth in the 1940s in the custody of Nazi SS agents, and learns that Nazi-uniformed aliens have successfully helped Germany invade the United States. When he manages to break free of his captors, Archer joins forces with American resistance fighters to unravel the conspiracy behind the occupation. Meanwhile, believing Archer sacrificed himself to save Earth, T'Pol and the battle-weary Enterprise crew attempt to figure out how to return to their own time. But then a near-dead Daniels appears and informs them that the future has been wiped out by a faction of the Temporal Cold War, the same faction responsible for the altered events on Earth, and they must be stopped.
- Archer reunites with his astonished Enterprise crew and learns from Daniels on his deathbed that a radical Temporal Cold War faction threatens to obliterate the timeline. Archer returns to the Nazi-occupied eastern United States of the 1940s, and enlists the help of resistance fighters Alicia Travers and Carmine to destroy a massive time machine under construction on the surface. Meanwhile, hoping to forge an alliance with Archer, alien leader Vosk releases his captured prisoners Tucker and Mayweather, but this forces temporal agent Silik to emerge from the shadows to pursue his own agenda against Vosk.
- The Temporal Cold War having been prevented, Daniels returns the Enterprise to Earth in February 2154.

2154, April
ENT Episode "Home"
As the Enterprise crew revels in a heroes' welcome on Earth, Trip joins T'Pol on a trip to planet Vulcan, excited to visit her home and be introduced to her mother T'Les. But when T'Pol becomes obliged to reconsider marriage to former fiancé Koss, the future of their relationship is put in question. Meanwhile, Archer must defend some of his morally questionable decisions during the Xindi conflict before a Starfleet Command panel of inquiry. Later, Phlox experiences prejudice against aliens while taking shore leave on Earth with Malcolm and Travis.
2154, May 15 - 20
ENT Episode "Borderland"
After a dangerous group of genetically engineered humans called "Augments" escapes from their secluded planet intent on causing all-out war between Earth and the Klingons, the Enterprise crew is called into action and Archer enlists the help of criminal genius Dr. Arik Soong, the scientist responsible for creating the Augments. While searching for the Augments in the Borderland -- the volatile region between the Klingon Empire and the Orion Syndicate -- Enterprise crosses paths with a band of ruthless Orion slave traders, who kidnap T'Pol and eight other crew members off the ship so they can be sold at auction, forcing Archer to enact a risky rescue mission with Dr. Soong's help.
2154, May 20 - 23
ENT Episode "Cold Station 12"
Reunited with his genetically engineered creations called Augments, criminal scientist Dr. Arik Soong and his "children" break into the medical outpost where Soong once worked, to steal the embryos of hundreds more potential Augments with plans to build a superhuman army. They will go so far as to release the deadly pathogens stored at the facility, Cold Station 12, if the staff, headed by Dr. Jeremy Lucas, dares impede Soong's plan. Meanwhile, Archer and his crew search for clues to Dr. Soong's whereabouts on Trialas IV, the planet where he raised the Augments, leading them to find one of the doctor's less perfect children who was abandoned by his siblings.
2154, May 23 - 27
ENT Episode "The Augments"
- Enterprise pursues Arik Soong and his Augments across hostile Klingon space toward a planet where the geneticist intends to go back into isolation and raise an army of genetically engineered superhumans. But Soong's "children" revolt against him and plan a biological attack upon a Klingon colony, in order to incite retaliation against Earth.
- Having recovered Augment DNA from the wreckage of the Bird of Prey, the Klingons begin a secret project to create genetically enhanced warriors (ENT: "Affliction").
2154, June
ENT Episodes "The Forge", "The Awakening", "Kir'Shara"
- The Earth embassy on Vulcan is bombed, killing 31 humans and 12 Vulcans. Enterprise is called to the planet to help investigate, but the Vulcan High Command already suspects a dissident religious faction known as "Syrrannites." T'Pol learns from her husband Koss that her mother T'Les has been forced into hiding to avoid arrest -- because she is a Syrrannite. Koss also brings her a mysterious heirloom containing a map. Believing this is a message from T'Les, T'Pol and Archer set out to follow that map across a treacherous desert, without the High Command's knowledge.
- On a quest to learn the truth behind the bombing of the Earth embassy on Vulcan, Archer and T'Pol track down the Syrrannites, a revolutionary faction hiding in a desert sanctuary which includes T'Pau -- the prime suspect in the bombing -- and T'Pol's mother T'Les. The rebels are on the verge of being crushed by Vulcan High Command leader V'Las, but they are stunned to learn that Archer might hold the key to their survival. While Vulcan's state of unrest grows more violent, former Ambassador Soval reveals to Trip that the High Command also plans to launch a massive sneak attack against rival planet Andoria, an act that could pull Earth into interplanetary war.
- Archer, T'Pol and rebel leader T'Pau struggle to reach the Vulcan capital to publicly unveil their discovery of a revered ancient artifact that could revolutionize Vulcan society and topple the corrupt government. Meanwhile, with help from allies among the Vulcans and Andorians, the Enterprise crew attempts to stop V'Las and the Vulcan High Command from launching a sneak attack upon rival planet Andoria.
- The Vulcan High Command is dissolved, and Earth is allowed to continue space exploration unfettered.
2154, July
ENT Episode "Daedulus"

The crew welcomes aboard Emory Erickson, the inventor of the transporter device, set to conduct a series of experiments to test a radical upgrade to the technology. However, once Enterprise reaches the test site, Archer realizes that his old family friend has lied and is using the ship to search for his son, lost years before in a transporter mishap (one week after the death of T'Pol's mother in ENT: "Kir'Shara").

2154, August
ENT Episode "Observer Effect"
- NX-02 Columbia, the second Warp 5 capable starship launches from Earth orbit (14 months after Enterprise is refitted in ENT: "The Expanse").
- After Hoshi and Trip contract a deadly virus while exploring a planet, two ghostly aliens possess the bodies of various Enterprise crew members to observe humanity's reaction to imminent tragedy. As the aliens secretly jump bodies to observe, Phlox strives to cure the stricken pair, but with his efforts failing, Archer must make a difficult decision in order to shield the rest of the crew from this growing biohazard.
2154, November 12 - 14
ENT Episode "Babel One"
- Ordered to transport a delegation of argumentative Tellarites to a peace conference with the blue-skinned Andorians, Archer and the crew find themselves drawn into a confusing, dangerous situation when a secret Romulan vessel begins attacking ships on all sides, including Enterprise (Date given in episode).
2154, November 15 - 17
ENT Episode "United"
- Trapped aboard a mysterious drone ship that's been terrorizing the region, Trip and Malcolm work to outwit the Romulans, who are piloting the vessel via remote control, in order to save their own lives and stop the feuding Andorians and Tellarites from going to war.
2154, November 17 - 22
ENT Episode "The Aenar"
- Archer visits Shran's icy homeworld to find an Andorian subspecies called the Aenar, to determine their connection to the marauder destroying ships in the region.
2154, November 26
- Enterprise returns to Earth for the launching of the USS Columbia [ENT: "Affliction"].
2154, November 27 - November 30
ENT Episode "Affliction"
On Earth, Dr. Phlox is kidnapped by a band of Klingons who are desperate to find a cure for a genetically-engineered virus that threatens their entire race. Meanwhile, Trip begins his new assignment aboard the Starship Columbia as it prepares to embark on its maiden voyage (Date given in episode).
2154, November 30 - December 2
ENT Episode "Divergence"
- With the help of Captain Hernandez, Trip and the newly-launched starship Columbia, Archer pursues the kidnapped Phlox deep into Klingon territory, as Phlox decides to cooperate with finding a cure to a virus ravaging a Klingon outpost. Meanwhile, Archer demands that Reed disclose his secret orders when his ties to a mysterious intelligence organization are revealed. Later, when Trip temporarily returns to Enterprise, T'Pol tries to broach an uncomfortable subject with him.
2154, Early December
The Mirror Universe Tholians conduct their interspace experiment, and the effect captures the USS Defiant from the "normal" universe in August 2268.  The crew of the Defiant is driven mad by the effect, and driven to murder, which results in the death of the entire crew.  An attempt to recover the vessel by the Enterprise in 2268 fails,  and the Defiant ultimately comes through the interspace effect intact and into the hands of the Mirror Tholians who use humanoid slaves to begin looting it (date is speculation based on ENT: "In a Mirror Darkly, Part One" , other details from TOS: "The Tholian Web").
2154, December 27 - December 29
ENT Episode "Bound"
After Archer forges a deal with the Orions, the trader presents the captain with a gift -- three alluring Orion women who proceed to seduce all the men on board except, mysteriously, Trip.
2155
- The Gorns lose the first Gorn-Romulan War at the Battle for Gorn-Shima [Starfleet Battles].
- Kethas epetai-Khemara is born in the Klingon Empire [TOS 16: "The Final Reflection"].
- Star Fleet Command institutes a Mobilization Alert to bring all bases and construction facilities to combat readiness. As part of the Mobilization Alert, a Zone of Transport Escort is established in the disputed areas. Star Fleet assigns military escorts to all priority transports [FASA Roleplaying Guide, Second Edition].
2155, January 13 - January 17
ENT Episode "In a Mirror, Darkly, Part I"
In an alternate universe, an amoral, imperialistic version of the Enterprise crew, led by Captain Forrest with Archer as his treacherous first officer, makes an astonishing discovery during a mission into enemy alien territory. While a power-hungry Archer schemes against Captain Forrest, his lover Hoshi, and loyal slave T'Pol, so he can lay full claim to the discovery. Later, Phlox happily tortures a captured Tholian for information requested by Archer.
2155, January 17 - January 20
ENT Episode "In a Mirror, Darkly, Part II"
After using the Defiant to repel a Tholian attack, the power-hungry Archer and Enterprise crew set about using this advanced ship to seize control of all of Earth's Terran Empire. As Archer takes full command of the Defiant and reviews the alternate history of Starfleet, his duplicitous lover Hoshi, a traitorous T'Pol and a reptilian Gorn stowaway hatch schemes of their own.
2155, January 18 - January 25
ENT Episodes "Demons", "Terra Prime"
- On Earth for a historic Starfleet conference to ratify the coalition of planets, Archer and the crew uncover a plot by a radical xenophobic group of humans called Terra Prime, led by Paxton, who want to put an end to the increasing number and influence of aliens on Earth. Meanwhile, although T'Pol contends she has never been pregnant, she and Trip learn that Terra Prime has information about their child. Later, a female reporter from Travis' past pursues him for a story.
- In the first steps towards the foundation of the Federation, Captain Archer and the crew must stop Paxton, a well-armed, radical human isolationist leader, who is threatening to destroy Starfleet Command unless all aliens leave Earth immediately.
2155, February 2
Starwide Merchants, Inc. is founded in Grinitaine, Alpha Centauri to finance and equip colonial expeditions [FASA Roleplaying Guide, Second Edition].
2155, August 9
The Vanguard colony, whose residents have now evolved into a quadruped race known as the "Neal," falls into an interspatial rift and emerges 210,000 light-years away, in the center of the Small Magellanic Cloud [Star Trek Lost Era 1: "The Sundered"].
2156 ROMULAN WARS, FIRST LYRAN-HYDRAN WAR BEGIN
- Incident at Davron IX starts First Earth-Romulan war. Outer Sector Defense Outpost 1, located in the Davron system, is destroyed by a squadron of seven Romulan cruisers. Commodore Tonsum Han of the U.S.S. "Garibaldi" ("Horizon" class), commanding the 159th Combat Squadron, has his entire force out on maneuvers during the time of attack. He is subsequently court-martialed and discharged for dereliction of duty [FASA Roleplaying Guide, Second Edition, Spaceflight Chronology].
- The first major war with the Romulan Empire begins with the destruction of the U.S.S. Balboa. The initial conflict will last four years [TOS 35: "The Romulan Way" - Rihannsu #2, also TOS 85: "Republic" - My Brother's Keeper #1 and TOS Giant Novel 18: "Federation"].
- Advanced laser weaponry, in development for eight years, is approved for use on all "Horizon" class cruisers. Designed by Captain Theodore Weller of the "Cavalry" class starship U.S.S. "Poisson" at the Centauri Firing Range, the lasers can be warp-accelerated at their target having a spread departure of 2.3x10^-9 [Spaceflight Chronology].
- In his now-famous "Sighted Man of Peace" address to the UEP Council, Senior Councilman Abraham Dannon recommends offering a peace treaty to the Romulans. During the next ten days, advocates of both viewpoints hold heated discussions on the proposition [FASA Roleplaying Guide, Second Edition].
- The Federation Council votes on Councilman Dannon's proposal for a peace offer. The measure is accepted by a one-vote margin, and is immediately transmitted via subspace radio to the Romulan Star Empire [FASA Roleplaying Guide, Second Edition].
- An Educational Sub-committee of the Military Staff Committee to the Federation Council is established. Its responsibilities are to locate a site for a Star Fleet Academy on Earth, complete designs for the campus and buildings, develop a curriculum, and recommend suitable faculty and staff members. [Starfleet Academy Student Handbook]
- The Lyrans, a felinoid race probably related to the Kzinti, attack what they believe is a Klingon mining colony. The outpost is, instead, from the Hydrans, and not previously known to the Lyrans. Thus begins the first Lyran-Hydran War.
- Warp technology is developed by most Far Side races at this stage, though the KCA (Krebiz Capitalist Alliance) delays implementing this new technology [Starfleet Battles].
- Star Fleet Command and several leading universities co-publish a report on the Romulan race. This study examines all available information on the Romulans and describes their threat to the Federation [FASA Roleplaying Guide, Second Edition].
- The Vulcan Outreach period begins [Starfleet Medical Reference Manual].
- First starbase is established near the Berengeria System (speculation based on ENT: "Bound").
2156, June
- Soldier Sh'Laran graduates the Andorian War College. He is assigned to the AIV Tenori as a Helmsman.
2156, December
Two women are killed in Heliopolis City on Alpha Eridani II by an entity variously known as "Jack the Ripper" and "Redjac" [TOS: "Wolf in the Fold"].
2157
- Romulan 'invasion' fleet destroyed by combined Vulcan/Tellurite/Andorian/Centaurian/Terran comprised fleet in sector of 'Outlands' later named "Hells' Gate" [FASA Roleplaying Guide, Second Edition].
- After several months of careful analysis and discussion, ranking Star Fleet officers at Starbase 3 report their decision. All subsectors within Sectors 5, 7, and 10 go to Code 1 War-Alert status to combat the Romulans' irregular hit-and-run tactics [FASA Roleplaying Guide, Second Edition].
- Izar (Epsilon Bootis III) becomes the 10th U.F.P. member ["Star Trek Maps"].
- The first "Merchantman" Class J cargo ships are constructed. 1,827 of these warp 1.3, 12-man vessels will be built by 2175 and many will remain in service well into the late 23rd Century [Merchantman Class J Cargo Ship Blueprints].
- Discussions are held at the highest echelons of the Federation and Star Fleet Command. As a result, President of the Earth Council Cristofur Thorpe issues a sealed, standing order by subspace radio to all individuals possessing the rank of Admiral, Council Secretary, or Senior Ambassador. If formal contact is made with the official Romulan government, the Federation will demand that all hostilities cease immediately, or a state of war will be declared. Any military or governmental official receiving this order has the full authority of the U.E.P. to authorize such a declaration [FASA Roleplaying Guide, Second Edition].
2158 LYRAN-KLINGON WAR ENDS
- Two women are killed in Heliopolis City on Alpha Eridani II by an entity previously known as "Jack the Ripper" and later known as "Redjac" [TOS: "Wolf in the Fold"].
- Alpha Centaurian ship AMS Oguma lost near Narendra system to unknown enemy ships [FASA Roleplaying Guide, Second Edition].
- The Lyran-Klingon War ends when several Lyran clans abandon the war to protect their homes from the Hydrans. The Lyrans are forced to accept an unfavorable settlement [Starfleet Battles].
- Soldier Sh'Laran receives the Andorian Regent's ribbon.
2159 LYRAN-HYDRAN WAR ENDS
- The Lyrans defeat the Hydran invasion, but reach a negotiated settlement rather than continue the war. The first Lyran-Hydran War ends [Starfleet Battles].
- Star Fleet's 150th Combat Squadron, under the command of Admiral Rex Gunther, meets a solitary Romulan U-13 class cruiser near Eta Leonis VI. Instead of attacking, Admiral Gunther follows Thorpe's instructions, opens known Romulan hailing frequencies, and warns the invading ship of his orders. Gunther gives the Romulan government six months to respond. Otherwise, it means war. Though the Romulan ship does not communicate, it is permitted to depart with the warning. This marks the sole meeting of Federation and Romulan warships without bloodshed on either side [FASA Roleplaying Guide, Second Edition].
- Since Admiral Gunther issued his warning, at least one Federation warship has remained in the vicinity of Eta Leonis VI, awaiting a Romulan response. The U.S.S. "Patton", a brand-new "Marshall" class destroyer, is the ship on picket duty when three U-15 class cruisers close, in the TriBeta Sector advancing on the Rigel star system. While decelerating, the Romulans open fire. They have 4 laser banks per ship with a regeneration delay of 24.3 seconds. The "Patton's" Captain Joseph Spadora makes one transmission before a Romulan cruiser fires a single guided missile. The torpedo his the side of the "Patton", totally disintegrating it. Spadora's message is received by other vessels in the area and relayed throughout the Federation. The Romulans' intentions are clear, and war is declared.[FASA Roleplaying Guide, Second Edition, Spaceflight Chronology].
- Intercepted subspace radio communications are translated and analyzed to help the U.F.P. understand their foe. The Romulan War calls attention to the strategic importance of the Triangle [FASA Roleplaying Guide, Second Edition].
- The U.E.P. confronts the Romulans near the Rigel Star System [Spaceflight Chronology].
- The Earth Council receives a response from the Romulan Star Empire. According to their Imperial Senate, the treaty must contain the provisions that no members of the warring races meet face-to-face, and that no ships cross a negotiated Neutral Zone. Additional information on the exact location, dimensions, and restrictions applying to the Neutral Zone are also emphatically requested. Councilman Dannon, placed in charge of the subspace negotiations, responds within one week [FASA Roleplaying Guide, Second Edition].
- A third spaceship disappears in the Taurean region of space, never to be heard from again [TAS: "Lorelei Signal"].
- Romulans capture the Heisenberg in an attempt to obtain Terran warp technology. Tobin Dax and Skon of Vulcan reclaim the ship with the aid of a transporter prototype [DS9: "The Lives of Dax" - Dead Man's Hand].
2159, September
- Soldier Sh'Laran enters a three year program at the Vulcan Science Academy.
2160 ROMULAN WARS END
- The Earth-Romulan War which has been fought with atomic weapons ends with the Battle of Cheron. The Battle of Cheron is fought in Romulan space between two squadrons of Federation ships and remnants of four Romulan groups. The battle ends inconclusively when neither side has any combat-capable ships remaining. This battle marks the U.F.P.'s last opportunity to organize a fleet strong enough to reach the supposed location of the Romulan homeworld. It is considered a victory nevertheless, because the Romulans lose more than the Federation. Admiral Alex Hamilton, commander of the flagship "Hannibal" of the "Marshall" class, announces the end of the Romulan War.
- Dr. Mordecai Challah urges reconsideration for a Code 1 Priority Research effort to discover the cause and a cure for a new medical affliction resulting from the war effort: rapid-growth cancer of the skin and skeletal structure apparently from Romulan laser bombardment.
- A Neutral Zone is set up separating Terran and Romulan space. The Romulan Neutral Zone, an egg-shaped area of space 10 light years in width, 750 parsecs along the galactic longitudinal plane and extending to the outer boundary of the galaxy in the vertical plane, with 128 Trianguli at the center, is established and construction begins on asteroid outposts bordering on the Zone. A period of withdrawal permitted by the treaty will last until July of 2165. All invading U.F.P. and Romulan forces begin retreating at maximum warp speed to their respective sides of the new boundary.
- At this time, humans have no knowledge about Romulan physiology and history. The treaty is negotiated via subspace radio. The Romulan War ends with the Treaty of Alpha Trianguli (Algeron), between Praetor Karzan of the Romulan Star Empire and Cristofur Thorpe, Governor of the Federation Council of the U.F.P. It is the first treaty in U.F.P. history to be negotiated entirely by data upload over subspace radio (Frequency K). The Imperial Senate of the Romulan Star Empire broadcasts its ratification of the Treaty of Peace on all subspace frequencies. The message is picked up by Federation starships along the border, and the treaty terms go into immediate effect. After 17 years of piratical attacks and declared hostilities, the Romulan War is finally over after staggering losses on both sides [TOS: "Balance of Terror", TNG: "The Defector"]
- Vulcan pledges to join a new, amalgamated Federation [Starfleet: "Year One", also TOS Giant Novel 18: "Federation"].
- Jonathan Archer takes the NX-01 Enterprise back to Earth for decommissioning [ENT: "In a Mirror Darkly, Part II].
2161
- In the aftermath of the Romulan conflict, the U.F.P. Constitution is signed and Starfleet is commissioned as the armed services via the Paris Charter [TOS Giant Novel 18: "Federation"].
2161, March
- A Terran Star Fleet Academy on Earth is considered. [TNG: "Manhunt", Starfleet Academy Student Handbook]
- Growing for over a century as a lone entity, UESPA's many vessels are incorporated into the Star Fleet of the new United Federation of Planets. All Starfleet ships use the USS prefix designation [Starfleet Tactical Database Series II].
2161, May 5-8
ENT Episode "These are the Voyages..." - FINAL ORIGINAL/TELEVISED EPISODE OF ENTERPRISE
- Six years in the future, an emotional Captain Archer and the crew return to Earth to face the decommission of Enterprise and signing of the Federation charter, ratifying the newly-formed alliance of planets they helped forge.
2161, May 8 - United Federation of Planets Formed
- The United Federation of Planets is formed, consisting of the United Nations of Earth (Sol III), the Planetary Confederation of 40 Eridani A (Vulcan), the United Planets of 61 Cygni (Tellar), the Star Empire of Epsilon Indii (Andor), and the Alpha Centauri Concordium of Planets (Centaurus VII). The U.F.P. sphere of influence is a 90 parsec diameter sphere centered on Sol, approximately 380,000 cubic parsecs. Under the Articles of Federation, expenditure is granted for the construction of an initial total of fourteen heavy cruiser starships and seventeen starbases. Star Fleet becomes the organizational name for United Earth Star Fleet, The Andorian Royal Navy, the Centaurian Fleet, The Tellarite Defense Force, and the Vulcan Exploratory Fleet, a military chain of command roughly based on that used by NATO in the 20th Century and the military forces of all five U.F.P. members (and those of subsequent member systems) are consolidated under it. The goals of the U.F.P. include ensuring interstellar security and improving economic trade, scientific research, and galactic exploration. In conjunction with these objectives, Star Fleet Command is to be created within the next three years, providing a unified military force for exploration and common defense. Also established very early in the development of Star Fleet is the Special Security Division (SSD). The SSD's elite group of security investigators will be forever criticized and an undertone of fear and dislike will in time develop between the SSD and Star Fleet through the 23rd Century. The Orion Colonies offer to join the U.F.P., provided that they are paid ten trillion credits "in compensation." Their request is rejected, and so they remain outside the Federation. The Orions also maintain the secret of the existence of the Klingon Empire. The Klingons are just one of many cultures with whom the Orions trade, and so they continue to go unnoticed by the newborn Federation. Harmon Axelrod is the first president of the U.F.P. Council. [Spaceflight Chronology, TOS Original Novel 16: "Death's Angel", Starfleet Battles, FASA Roleplaying Guide, Second Edition].
- The founding ceremonies are held on Earth.  Jonathan Archer is in attendance, and reads an important speech. (Archer visits this event with Daniels in ENT: "Zero Hour", and again is there in ENT: "These are the Voyages...")  The entire Sol system is a founding member as Earth brings both Luna and Mars into the Federation with it as it joins.  Presumably, other earth settlements such as Vega Colony are not self-sufficient enough to yet seek membership independent of Earth [Star Trek Star Charts].
- Section 31, which was formed at the creation of Earth's Starfleet [ENT: "Divergence"], at this time grows to become a covert organization within Federation Starfleet intelligence which deals with threats to the security of the UFP. Members of this organization defy the principles of the Federation in order to protect them, which is one of the reasons why Section 31 is not officially sanctioned by Starfleet or the Federation and its very existence is not acknowledged openly [DS9: "Inquisition", DS9: "Inter Arma Enim Silent Leges"].
- Part of the Federation Charter is the non-interference directive, or Prime Directive, which prohibits interference in the affairs of sovereign planets or societies [DS9: "Inter Arma Enim Silent Leges"].
2161, October 11
The first UFP Council is held after Andor, Tellar, Earth, Vulcan, and Alpha Centauri sign the Federation Constitution earlier in the day. Earth's Ambassador to the UFP, Thomas Vanderbilt, is elected President, with Sarahd of Andor serving as Vice-President [Newspaper clipping from Star Trek VII: "Generations" - Directly contradicts the item above for May 8, but I'll take it as assumption that Vanderbilt was an interim President until a Federation-wide election could be enabled].
2162
- Stranded for seven months on what is now known as Baker's World, the crewmen from the U.S.S. "Cavalier" are picked up by the U.S.S. "Lorelei" without having suffered any casualties. For his skill and leadership, Lt. Lawrence David Baker receives the Star Fleet Commendation of Valor and a promotion, as well as becoming an immediate media hero [FASA Roleplaying Guide, Second Edition].
- Peace reigns, but the Orion Colonies know that the Klingon Empire will soon discover the existence of the Federation. The Colonies sign non-aggression and trade treaties with the Federation, but still remain outside the U.F.P. [FASA Roleplaying Guide, Second Edition].
- At this time, realizing that they are technologically outclassed and outnumbered, and that they have no hope of winning a prolonged conflict, the Romulans consolidate along the new U.F.P.-Romulan Neutral Zone. They begin major construction of outposts to keep track of Federation forces and keep them in check. Just homeward of these outposts, forces for future expansion into Federation territory are built [FASA Roleplaying Guide, Second Edition].
- Atomic warfare rips away the atmosphere of Alpha Xaridian IV, obliterating the populance [TOS 59: "The Disinherited"].
- Dohlman Kiyaan, fourteenth of the line of Sevuth, reigns on the planet Elas. She will reign for only three Elasian years until the revolt of the Snake Clans [TOS 68: "Firestorm"].
- The Rey of Gullrey being their era of long-range space exploration [TOS 67: "The Great Starship Race"].
- By this time, the Klingons have begun to perfect shipboard disruptor technology, which they are deploying throughout their fleet. With the Romulan War now over, the Orions now realize that the U.F.P. and the Klingon Empire must eventually encounter one another. At this moment, however, the Klingon military is occupied with raids against the weakened Romulan border. The Orions nevertheless fear that the Klingons will soon turn their attention again in the direction of Rigel and her interstellar holdings. Realizing that any contact between the U.F.P. and the Klingon Empire must inevitably lead to armed conflict, the Orions hastily negotiate several non-aggression and trade treaties with the U.F.P., but still do not join the Federation [FASA Roleplaying Guide, Second Edition].
- The negotiations establishing the Romulan Neutral Zone destroy the political aspirations of Councilman Dannon. His opponents claim that he, as chief negotiator, gave away too much of the disputed area to the Romulans. Dannon is politically censured, and later, loses his position as Federation Councilman [FASA Roleplaying Guide, Second Edition].
- Captain Lucien Murat and the crew of the U.S.S. Verdun are stranded on Torgu-Va during a war with the Tarn. They and their descendants will remain stranded for 204 years [TNG 57: "The Forgotten War" - Note: The descendants of the Verdun claim knowledge of the Enterprise, which obviously must refer to the NX-01, though Riker mistakenly calls it "Constitution-class."]
- Lt. JG Sh'laran graduates from the Vulcan Science Academy.
- Sh'laran is assigned to the NX-07 Miranda as a Science Officer.
- Sh'laran is officially reprimanded for assault upon a fellow officer.
- Hoshi Sato invents the lingual code translation matrix.   This is presumably the basis of the universal translator, which is an integral Federation technology from here on (happened when Hoshi was in her late 30's according to her Starfleet records as found on the 23rd century era Defiant in ENT: "In a Mirror Darkly, Part Two").
2163
- With the Romulan War ended, budgetary constraints force Star Fleet Command to decommission a number of warships. The entire fleet of "Messier" class cruisers is deactivated, even though the class served exceptionally well throughout the Romulan War. The Zone of Transport Escort is lifted, and galactic peace brings tremendous growth in industry, trade, and tourism. [FASA Roleplaying Guide, Second Edition, Spaceflight Chronology].
- A woman challenges the Right of Supersedence on Ligon II--the last to do so til 2364 [TNG: "Code of Honor"].
- Lt. JG Sh'laran is promoted to LT. and Chief Science Officer of the NX-07 Miranda.
2164
- The Energy Barrier at the edge of the galaxy is first detected [Starfleet Dynamics].
- Neural nets fall out of favor for general use during this era. The reliability of parallel processors and subspace information buses that bypass the speed of light limitations solves the speed problem in conventional computers [TOS 77: "Twilight's End"].
- The Hoshan are attacked in space and mistakenly assume the Zeator are responsible [TOS 32: "Chain of Attack"].
- The First Lyran-Kzinti War begins [Starfleet Battles].
- Klingon Emperor Kadrya is born in the Empire [TOS 16: "The Final Reflection"].
- The period of withdrawal from the Neutral Zone permitted under peace treaty is now over. From this time on, no warship may cross the Romulan Neutral Zone. All Federation cultural exchange programs resume, after having been suspended during the Romulan War. Federation officials release a public survey poll showing rising confidence in the U.F.P. and its ability to perform its intended duties [FASA Roleplaying Guide, Second Edition].
- The Galactic Outreach Program resumes after a ten year suspension [Spaceflight Chronology].
- Shuvinaaljis Warp Technologies, Inc. is founded in Shuridar, Vulcan as a manufacturer of warp engine systems. They will later develop a new range of micro-warp engine technologies [FASA Roleplaying Guide, Second Edition].
- S'Lek Varan is founded in Shuridar, Vulcan. A producer of auxiliary and support systems for both commercial and military craft, it will not only contract through the Vulcan government but also work as a sub-contractor for other less specialized shipbuilders on cooperative projects [FASA Roleplaying Guide, Second Edition].
- The drug felicium is used to halt a plague on Ornara. It is not realized at the time that felicium, a product of Brekka, has powerfully addictive properties, making the Ornarans dependent on the drug long after the plague has been controlled [TNG: "Symbiosis" - 200 years prior].
- Birth of Sarek, son of Skon [TOS: "Star Trek 4" - Journey to Babel].
- Jonathan Archer is appointed an honorary member of the Andorian Guard by General Thy'lek Shran [ENT: 'In a Mirror, Darkly II"].
2165

- UFP StarFleet Academy admits first class at San Francisco, Earth campus on Treasure Island in San Francisco Bay, Earth.
- Abraham Dannon, author of the Romulan/Federation peace treaty and chief negotiator of its provisions, is assassinated by a spectator at a political rally where he was scheduled to speak. A controversial, much-despised figure in his own time, Dannon will later be revered for his contributions to galactic peace. The Terran civilian decoration for peace, the Dannon Prize, is named for him [FASA Roleplaying Guide, Second Edition].
- The Star Fleet Lunar Hall of Justice is constructed in Oceanview on Earth's moon [TOS Giant Novel 7: "Prime Directive"].
- The Omega Sejanus system is colonized [TNG: "The Outrageous Okona"].
- Privately funded genetics labs on Earth produce the first Human-Vulcan hybrid. The accomplishment is kept secret for almost a century [TOS 44: "Vulcan's Glory"].
- The Near Side Krebiz system of Alnid is the centerpiece in the First Klingon-Kzinti War. The Klingons capture Alnid in 2188.
- Guinan meets the Q [TNG: "Q Who?"].
- Sarek of Vulcan is born [Star Trek Encyclopedia, Star Trek Chronology, TOS: "Journey to Babel", TNG Giant Novel 16: "Sarek"]
- The planet Deneva is colonized (over a 100 years prior to TOS: "Immunity Syndrome").
- The Statutes of Alpha III are drawn up, a key development in the legal history of the United Federation of Planets (Date is completely speculative based on TOS: "Court-Martial" - The book "Worlds of the Federation" indicates that these statutes were part of the reason that Alpha III was the first planet to be admitted to the Federation after the admission of the charter members in 2161, but this is unsubstantiated in other sources).

2166
- Rigel (Beta Orionis) becomes the 11th U.F.P. member, specifically the Rigel Colonies (Rigel II and IV) [Star Trek Maps].
- The U.F.P. border is redefined between Rigel, Deneb, and Antares; 480 parsecs in diameter [Star Trek Maps].
- Rampart (Rho Ophiuchi) is colonized by Earth [TNG 11: "Gulliver's Fugitives"].
- The Chyrellkans make their first landing on their sisterworld Vancadia [TOS 55: "Renegade"].
- The Ab'brax tradition is phased out on Betazed [TNG 18: "Q-in-Law"].
- A plastic Elasian stellar map is made [TOS 68: "Firestorm"].
- LT. Sh'laran receives a Starfleet Commendation and is promoted to Lt. Commander.
- The NX-07 Miranda is lost mapping the Mutara Nebula. Its fate does not become known until 2380, when it re-emerges.
2167
- The "Daedalus" (NCC-170) class exploration craft are 104 meter long, warp 3.7 capacity starships. The class will total 20 vessels (NCC-170 - NCC-189), each armed with 4 laser emplacements and carrying complements of 120. The same general design will be carried over to the "Horizon" and "Archon" classes in the late 22nd Century [Jackill's Daedalus Class Exploration Craft Data Sheets].
- The Bekeem colony ship is completed [TNG 14: "Exiles"].
- In the Pyrimilis Star System, two inhabited planets are found by the U.F.P. on the same orbit, on a collision course. Discovered by Captain Carlos Dos Passos of the U.S.S. "Gemini" ("Libran" class), they are powerless to interfere with the religion of the union of the two worlds existing on both planets [Spaceflight Chronology].
- HiBeam Energies, Ltd. is founded in Lunda City, Luna. They will design the first phaser weapons systems [FASA Roleplaying Guide, Second Edition].
- The Starship Archon visits planet Beta III in star system C-111.
- The U.S.S. Essex (registry number NCC-173) is caught in a magnetic storm and destroyed above the Class-M moon on Mab-Bu VI