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The Khitomer Conference in the late 23rd century

"Captain Sulu, Captain Kirk, Doctor McCoy. They all belonged to a different breed of Starfleet officers. Imagine the era they lived in: the Alpha Quadrant still largely unexplored... Humanity on the verge of war with the Klingons, Romulans hiding behind every nebula. Even the technology we take for granted was still in its early stages: no plasma weapons, no multi-phasic shields... Their ships were half as fast."
"No replicators. No holodecks. You know, ever since I took Starfleet history at the Academy, I've always wondered what it would be like to live in those days."
"Space must have seemed a whole lot bigger back then. It's not surprising they had to bend the rules a little. They were a little slower to invoke the Prime Directive, and a little quicker to pull their phasers. Of course, the whole bunch of them would be booted out of Starfleet today. But I have to admit: I would have loved to ride shotgun at least once with a group of officers like that."

The 23rd century, defined in the calendar of Earth as being from 2201 until 2300, was a period of expansion for the United Federation of Planets, with Humans and other founding species, such as Vulcans, at the forefront of exploration. The Federation's exploration agency Starfleet would make first contact with numerous intelligent species and civilizations, including the Talosians, the First Federation, the Gorn Hegemony. the Metrons, the Horta, and the Excalbians. The long-running conflict with the Klingon Empire, begun in the 22nd century, was a major part of this century's history, as was the rekindling of tensions with the Romulan Star Empire. Of particular note are the voyages of the USS Enterprise and the careers of its long-serving command staff under James T. Kirk.

Decades

2200s2210s2220s2230s2240s2250s2260s2270s2280s2290s

Major events

2223
Relations between the Federation and the Klingon Empire degenerate starting a tense cold war. (Star Trek VI: The Undiscovered Country)
2243
The duotronic computer is invented by Doctor Richard Daystrom, becoming the primary computing platform for all Starfleet vessels for the following eighty years. (TOS: "The Ultimate Computer"; TNG: "Relics")
2245
The Federation starship USS Enterprise is launched under the command of Captain Robert April. (TAS: "The Counter-Clock Incident"; DIS: "Brother")
The Federation starship USS Constellation launches under the command of Captain Matthew Decker.(PIC: "The Star Gazer" commemorative plaque [1])
The Battle of Donatu V is fought between the Federation and Klingon Empire. (TOS: "The Trouble with Tribbles")
2256
An open war between the Federation and the internally riven Klingon Empire breaks out. (DIS: "Battle at the Binary Stars")
2257
The costly Federation-Klingon war comes to an end and the Klingon Empire is politically stabilized. (DIS: "Will You Take My Hand?")
2258
Control is defeated and the mystery of the Red Angel is discovered by the crews of the USS Discovery and the USS Enterprise. After the conflict, the crew of Discovery jump 930 years into future. (DIS: "Such Sweet Sorrow", "Such Sweet Sorrow, Part 2")
2265
The El-Aurian homeworld is destroyed by the Borg. (TNG: "Q Who") Klingons and Federation sign some kind of peace treaty. (TOS: "Day of the Dove")
2266
After a century of isolation, the Romulan Star Empire engages in a series of unprovoked attacks on several outposts along the Romulan Neutral Zone. During the incident, the first visual contact of the previously unseen Romulans themselves are made, revealing them to be an offshoot of Vulcans. (TOS: "Balance of Terror")
2267
Federation-Klingon relations improve with the signing of the Treaty of Organia. Together with the Romulan Star Empire the two powers also establish a "colony of galactic peace" on Nimbus III. (TOS: "Errand of Mercy"; Star Trek V: The Final Frontier)
2278
The USS Bozeman disappears while on the Typhon Expanse. (TNG: "Cause and Effect")
2285
The detonation of the Genesis Device during the Battle of the Mutara Nebula, results in the formation of the first artificially-created planet. Due to the use of protomatter in the development of the device, however, the planet proves to be unstable and destroys itself soon after. (Star Trek II: The Wrath of Khan, Star Trek III: The Search for Spock)
2286
Earth is again saved from being obliterated by a probe of unknown origin. (Star Trek IV: The Voyage Home)
2293
Despite the prior assassination of Klingon Chancellor Gorkon, the Khitomer Accords between the Federation and the Klingon Empire are signed at the Khitomer Conference to establish a lasting peace between the two powers. (Star Trek VI: The Undiscovered Country)

Alternate reality

2233
The USS Kelvin is destroyed battling the Narada. (Star Trek)
2258
The Narada uses red matter to destroy Vulcan. The crew of the newly-launched USS Enterprise prevents a similar fate befalling Earth. (Star Trek)
2259
After a bombing in London, an attack on Starfleet Headquarters, and a massacre on Qo'noS, the terrorist Khan Noonien Singh crashes the dreadnought USS Vengeance into San Francisco before being arrested by the Enterprise crew and returned to cryogenic sleep. (Star Trek Into Darkness)
2260
A fully recovered Kirk gives a stirring speech about the principles of the Federation, and embarks on his historic five-year mission aboard the Enterprise. (Star Trek Into Darkness)
2263
After only three years into its five year mission, the Enterprise is destroyed during a battle over the planet Altamid, when it is attacked by Krall and his Swarm ships. The long-lost USS Franklin is discovered intact on Altamid by Montgomery Scott. (Star Trek Beyond)

Events without specified years

Prime reality

Early 23rd century

Mid 23rd century

Late 23rd century

Unspecified

Mirror universe

  • Late 23rd century to early 24th century: Sometime between 2267 and 2270, Spock becomes commander-in-chief of the Terran Empire and implements several major reforms, turning the Empire into a more peaceful and less aggressive power. Prior to the full enactment of these reforms, the Terran Empire forces occupy Bajor. Spock's reforms leave the Empire unprepared to fight against the Klingon-Cardassian Alliance. The Alliance conquers the entire Terran Empire, enslaving the Terrans and Vulcans. (DS9: "Crossover")
22nd century Timeline 24th century

Appendices

23rd century productions

External links

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