Der Thomed- Zwischenfall war 2311, allerdings schau mal mas ich hier gefunden habe:


Timeline:
2292 U.S.S. Enterprise-B begins construction as U.S.S. Yorktown.
2295 Star Trek Generations
U.S.S. Enterprise NCC-1701-B launched under John Harriman; James T. Kirk is apparently killed on ship's maiden voyage after participating in an emergency rescue of El-Aurian refugees.
Enterprise-B repaired after Nexus incident, begins operational service.
2305 Starship Enterprise-B makes first contact with the Cardassians.
2311 Tomed Incident, Romulans enter extended period of isolationism. U.S.S. Enterprise-B provides command and control during the incident.
2322 Starship Enterprise-B leaves on extended exploratory mission, pushing past the Gourami sector.
2334 Enterprise-B and Stargazer defeat Cardassian forces at Setlik III.
2336 Cardassian conflicts end; Enterprise-B serves as Federation diplomatic envoy during negotiations.
2337 Enterprise-B decommissioned.
Und dann stand da noch dass:
Severe structural damage and wear on the hull forced its retirement, where it is preserved as a museum piece along with the Enterprise-A. It is the longest-serving Starfleet ship to bear the name Enterprise.
Quelle: To boldly Go... The History of the Enterprise

Also ich für meinen Teil bin verwirrt