Destroyer (Romulan War Era)
These ships were intended to form close escorts for Missile Cruisers and Carriers. They armed with multiple smaller weapons and designed around anti-missile or anti-fighter defense.
When they operated according their intended role, they functioned well. However they were often forced into ad-hoc roles because no one had told he Romuland how they were expected to organized their fleets.
After the Romulan War and the Founding the of the Federation, Terran destroyers were retired to planetary defense roles where they were used until up.