2240s
The 2240s were an important decade for Federation space exploration, with the commissioning of new starship class known as . Captained by Robert T. April, with wife Sarah April as CMO, Enterprise experienced many exploration firsts in her long career, which began in 2245. These new ships benefited from advances in warp drive which came along with the breaking of the time barrier, and also new computer advancements such as duotronics, invented by Richard Daystrom in this decade.


Years

Events 
 The PXK pergium-powered nuclear reactor goes out of common use. One notable exception is the Janus VI colony. ()
 The decade also included one of the worst crimes in Federation history when four thousand colonists at Tarsus IV are put to death at the orders of Governor Kodos. ()
 Christopher Pike is assigned to the  under Captain Robert April. ()

Alternate reality 
 Approximately around the early to middle years of this decade, a young  went for a joyride in his stepfather's Corvette, bailing out just as the car fell into a deep quarry. ()
 Around the same time, a young  gets into a physically violent altercation with one of three other Vulcan students at the Vulcan Learning Center after they insult . ()

ru:2240-е
bg:2220те
de:2220er
fr:2220s
it:Anni 2220
nl:2220s
sv:2220-talet
pl:2221-2230
Alternate reality timeline