In 2154, at least six Intrepid-class United Earth starships greeted Enterprise (NX-01) following its return from the Delphic Expanse mission and escorted the NX-class starship back to Earth. One of them was the SS Intrepid itself.
The Romulan War
At some point before 2156, an unidentified Intrepid-class participated alongside Enterprise in a battle against Romulan T'varo-class birds-of-prey during the Earth-Romulan War.
|Intrepid class starships|
|United Earth, United Earth Starfleet (until 2161)||Intrepid • Pioneer • Republic • unnamed|