|years:|| 2250 2251 2252 2253 2254 2255 2256
|decades:||2220s 2230s 2240s 2250s 2260s 2270s 2280s|
|centuries:||22nd century - 23rd century - 24th century|
- The Klingons and the Romulans establish a joint colony on the planet Chal. 
- The Axanar Rebellion occurs. 
- The Federation and Klingon Empire fight at Axanar. The USS Heisenberg under Captain Garth of Izar is able to destroy the three klingon cruisers.
Promotions and TransfersEdit
- At the recommendation of Robert April, Captain Christopher Pike recruits the young cadet Spock to replace his science officer, who had come down with Virillian toxic fever, on the USS Enterprise. Spock accepts the position becoming an acting ensign. 
Births and DeathsEdit
References and NotesEdit
- ↑ TOS novel: The Ashes of Eden
- ↑ Last Unicorn RPG module: Star Trek: The Next Generation Core Game Book
- ↑ TOS - Boldly Go - Whom God Destroys comic: "Issue 11"
- ↑ EV comic: "Flesh of My Flesh"
- ↑ TOS novel: The Covenant of the Crown
| Flesh of My Flesh|
|Early Voyages||2253||comic||As the Ngultor probe Christopher Pike's mind, he recalls recruiting Spock to join the crew of the Enterprise two years into his command.|
|Vulcan's Glory||The Original Series||2253||novel||Set during Spock's first mission on the Enterprise. The Pocket Books Timeline places this story a year earlier in 2252; however, this does not mesh with Spock joining the Enterprise two years into Pike's command, as specified in "Flesh of My Flesh," so it is placed later here.|
| Spock: Reflections|
Spock: Reflections, Issue 2
|The Original Series||2253||comic||Takes place not long after Spock's arrival aboard the Enterprise (as per Vulcan's Glory), with Captain Pike and his crew still attempting to know him better as a person.|
|Demand of Honor||The Original Series||2253||role-playing game||During the Four Years War, a Klingon fleet is defeated at Donovan's Star by Andorian admiral Thelenth, at the cost of his own flagship.|
| Alien Spotlight|
|The Original Series||2253||comic||Set very shortly after Spock transferred to the Enterprise under Pike|
| Shadows on the Sun|
|The Original Series||2253||novel|
|Boldly Go, Issue 11||The Original Series||2253||comic||Flashback to 2253|
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