| 2251 2252 2253 2254 2255 2256 2257 |
| 2220s 2230s 2240s 2250s 2260s 2270s 2280s |
| 22nd century - 23rd century - 24th century |
Events
- The USS Enterprise diverts to Talos IV after receiving a distress call from the SS Columbia. (TOS: "The Cage")
- In an alternate timeline, Christopher Pike’s USS Enterprise is destroyed by a Doomsday Machine that had come back in time from 2373, causing a distortion in the recorded timeline. The Doomsday Machine begins duplicating itself and spreading destruction across the galaxy. Starfleet Command rescinds all standing orders regarding exploratory missions. Code named Operation: Ragnarok, the seemingly endless series of losing battles become colloquially known as "The Doomsday War." (Star Trek: Phase II: "In Harm's Way")
- The Minervon Incident: The USS Minervon is hijacked en route from Vulcan. The hijackers are believed to be members of the radical Sh'ak'atar religious sect. A failed rescue attempt by Starfleet resultes in the hostages being marooned for over a year. The Minervon Incident is used as a case study in the Academy survival course. (Star Trek: SFI)
- The starships USS Exeter and USS John F. Kennedy help establish the colony on Gamma Hydra IV. (Orion Press: The Mindsweeper)
Births
- Michael Sinclair is born in Ohio in the former United States of America on Earth. (Star Trek: USS Hathaway)
- David Stein is born on Earth. (Tales of the Seventh Fleet)
Deaths
Assignments and promotions
- James T. Kirk, Lystra Davis, Sarah Madison, and Chulan Sukarnoputri all graduate from Starfleet Academy. (Orion Press: "It's Not Fair") Androvar Drake was also an alumnus of that class. (The Ashes of Eden)
- Lieutenant James Kirk is assigned to the USS Farragut. (TOS: "Obsession")
- Ensign Spock is assigned to the USS Enterprise. (Short Treks: Q&A)