This is a list of events that occurred in 2266.
- Galen contacts Leonard Anderson and shows him the result of the test on Daltron 7 and an image of President Sheridan who is waiting at Babylon 5. The Drazi explorer evades capture by the Drakh, and hides a data crystal recording of the events in a pouch under his arm. He sets up a distress beacon before he found and killed by the Drakh.
- Tuesday, December 25th, 2266
- Matthew Gideon is ordered to return to Earth to help stop the impending Drakh attack.
- Friday, December 28th, 2266
- The Drakh attack Earth. The Death Cloud is destroyed, but the Drakh release a bio-genetic plague into Earth's atmosphere, infecting everyone on the planet.
|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|