Soyuz

The Soyuz-class "combat" frigates (classified as such mainly because they were not useful for much else) served Starfleet faithfully for much of the 23rd century and — briefly — in the dawn of the 24th. While they can be assumed to have been at least adequate for their day, that day had long passed by 2301. Most hulls had already been retired, but four remained in service. Towards the end of their lives they suffered repeated warp core issues that made the ships expensive to maintain and a hazard to their crews, eventually earning the Soyuz-class the unenviable distinction of being the first (and so far, only) class of starship to be scrapped in this century. Not even the desperate need for garrison ships during the late 2300s and early 2310s was enough to rescue the USS Vokau, USS Adelphi, and their sisters from the dustbin of history. The last Soyuz-class ships were scrapped in 2318 (after two were scrapped in 2314 and Starfleet's scrapping of all its Soyuzes in 2307).