Trekipedia

Endeavour NX-06

NX class. Launched June 2156. Due to the relatively slow pace at which the NX class ships could be built and the military necessities inherent during the Romulan War, Endeavour was the last ship of her class constructed, so that resources could be diverted to upgrading the existing and easier-to-build Daedalus class ships with the advances in warp drive and weapons technology created for the NX class.^[1]

References

• ^[1] ENT #13: The Romulan War: Beneath the Raptor’s Wing