This is a list of events that occurred in 2256:
- The Io Transfer point Jumpgate is destroyed by a terrorist bombing. A transport containing over 500 passengers was entering the gate when it exploded, destroying the transport and killing all aboard. Mr. Morden's wife and their daughter Sarah are among the dead.
- ISN broadcasts video of a grief-stricken Morden fighting off a horde of reporters.
- A miners strike hits Ganymede.
- Anna transmits a letter to her sister in law Elizabeth Sheridan and expresses her excitement at the Icarus mission next week. She also reveals that she will not be able to make her anniversary meeting with John Sheridan on Centauri Prime but doesn't have the heart to tell him her news first. 
- Earth Science Vessel Icarus departs Station Prime for Alpha Omega III. Soon thereafter it is presumed destroyed in space with no survivors.
- Ambassador Kosh departs the Vorlon Homeworld and communicates with Lieutenant Commander Laurel Takashima aboard Babylon 5 via StellarCom, audio only, to inform her he is en route.
|Before the Third Age:||20th Century and earlier 21st Century 22nd Century 2200s 2210s 2220s 2230s 2240s|
|2250s:||2250 2251 2252 2253 2254 2255 2256 2257 2258 2259|
|2260s:||2260 2261 2262 2263 2264 2265 2266 2267 2268 2269|
|2270s onwards:||2270s 2280s 2290s 2300s and beyond|