USS Valdemar

In 2333, the Valdemar was under the command of Captain Calabrese. The Valdemar was part of the task force organized to fight an unknown vessel attacking Federation vessels. (STA novel: Enigma).

In 2370, the Valdemar, the USS Prokofiev and the USS Enterprise (NCC-1701-D) were sent to the Cardassian border after Chief Miles O’Brien was arrested on false charges. (DS9 episode: Tribunal)