built to follow up on the constitutions 5 year missions, this class saw wide construction just before the refit era, only to be shuttered after renewed threats from both the klingons and the romulans threatened to end the cold war’s peace. they were shuttered with only seven produced, resulting in the follow up missions taking far longer than they should have. after the incident involving the take over of u.u.s. reliant by the superhuman khan, this class was picked back up with a refit design and rushed into service to prevent such an event from happening again, finishing the follow up mission. after three different incidents on planets examined by the enterprise alone were prevented almost two decades after the end of the five year missions, this class was hailed as an unmitigated success and retired with only two of the twenty four ships lost. essentially just a miniaturized constitution with the gemini and vengeance upgrades, this ship still saw service alongside the constitution class as backup ships during times of war.