| 2387 2388 2389 2390 2391 2392 2393
|2360s 2370s 2380s 2390s 2400s 2410s 2420s|
|23rd century - 24th century - 25th century|
- The Federation begins to explore the Delta Quadrant with its transwarp drive-equipped ship USS Calhoun. (Frontier Fleet)
- A small divergent group of Hirogen make it into the Alpha Quadrant and uncharacteristically strike Starbase 78, destroying several starships in the process. Task Force Epsilon and Task Force Zeta are sent out to stop the threat. (Star Trek: Phoenix-X: "Into Harshness")
- In the mirror universe, the Second Terran Empire is created. Julian Bashir becomes emperor. (Star Trek: Mirror Wars)
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