2400s

The 2400s was the first decade of the 25th century, preceded by the 2390s and followed by the 2410s. It spanned the years 2400 to 2409.
== Years ==
== Events ==
;2401
:A number of influential Starfleet s attempt to persuade the Federation Council to reconsider its position on the Klingon-Gorn War. Their petition is unsuccessful, and Worf cuts ties with the Federation.
;2403
:The Klingon-Gorn War ends. Slathis of the Gorn Hegemony swears fealty to the Klingon Empire.
;2404
: J'mpok gives Federation citizens in several sectors bordering Klingon space a three-month ultimatum to evacuate.
;2404, Multiverse timeline
:The Terran-Alliance War ends.
;2405
:The Federation-Klingon War begins after the Klingons invade the Korvat system.
;2405, Multiverse timeline
:Naomi Smith is assigned to the USS Yamato-A.
:A temporally displaced Simon Smith enters Starfleet Academy.
;2409
:Masc Taggart is presumed killed in action by the Klingons.
:The Borg invade the Vega colony but are repelled by a Starfleet task force.
;2409, Multiverse timeline
:Simon Smith is assigned to the as its chief engineer.
=== Deaths ===
;2409
:
== Appendices ==
=== Notes and references ===
=== External links ===
=== Navigation ===