Chronology

The Chronology gives an overview over historic events and the timeline of Star Trek Online.

Star Trek Online takes place in the Prime Timeline. This is the story continuity which includes the events of all the Star Trek television series and the first ten movies.

The biggest part of the game's story takes place in the early 25th century, roughly 30 years after the last on-screen appearance of the USS Enterprise-E in Star Trek: Nemesis and ten years after season 1 of Star Trek: Picard. Early missions for the Discovery and TOS Starfleet factions take place in the 23rd century, close to the setting of the respective series.

The events of the Kelvin Timeline (as depicted in the 2009 Star Trek film and its sequels) are generally part of a separate continuity, as they take place in an alternate universe. However, the destruction of Romulus in 2387 was first mentioned in these movies, and the setting is visited during the mission.

History
The relevant history of the major political powers in the galaxy spans several notable periods.

The in-game year

 * The largest part of the story of Star Trek Online takes place in the years 2409, 2410 and 2411.
 * Klingon, Romulan and Federation characters start in 2409 and the year 2410 is subsequently mentioned in the missions (Delta Recruit version) and . The in-game year following these missions is rarely mentioned on-screen.
 * Characters from the DSC Starfleet and TOS Starfleet factions, will start in the years 2256 and 2270, respectively. As their story advances, they will join other characters in the year 2409.
 * An oddity occurs in the mission : Intelligence files on various races in this mission mention stardates that correspond to the years 2411 and 2412. Notably, the files would place the missions of Victory is Life (and thereafter) in the year 2412.
 * The first formal confirmation that the game progressed to 2411 came from dialogue in where the player welcomes Burnham to 2411, but it is not stated when in the year it is so it is not possible to estimate how many previous missions may also have taken place in 2411.
 * Most automatically generated stardates in the game (i.e. in the personal mission log) advance in real time, and might correspond to years after 2410. This must likely be regarded as as a production idiosyncrasy.