The class appeared to be an intermediary between the Galaxy-class and the Sovereign-class, although there were design cues from the Ambassador-class, too. It had a Sovereign-style primary hull with a secondary navigational deflector set in the fore dorsal surface. The Sovereign-style connecting dorsal swept back and down to a long, sleek secondary hull with a flared sensor array running horizontally to the nacelle pylons. At the prow was a compact Galaxy-style deflector dish, and astern, at the tip of the undercut, was a structure similar to the refit Ambassador-class USS Yamaguchi's ventral shuttlebay. The two bulky, Galaxy-style warp nacelles were mounted on pylons that swept back from the hull horizontally before jutting forward slightly, similar to a New Orleans-class starship's.
The first Phalanx-class starship was assigned to the Federation-Klingon Empire border to restore tactical balance in the region following skirmishes provoked by the Kinshaya. Sherman's Planet was its homeport. (ST reference: Ships of the Line)