The USS Alexey Leonov was a Defiant-class escort starship in service to the Federation Starfleet in the late 24th century.

During the Borg invasion of 2381, the Alexey Leonov was assigned to defend the planet Korvat along with the USS Gibraltar. Although the USS Enterprise-E signaled the vessels to stand ready for an incoming Borg cube, there was little resistance the vessel could provide without transphasic torpedos. When the Borg attacked the planet itself, the Alexey Leonov followed the Gibraltar's example and put itself in the beam's path, sacrificing itself. (ST - Destiny novel: Gods of Night)

Defiant-class destroyer/escort starships
Federation Starfleet
(primary universe)
standard arrangement AjaxAlaskaAlbatrossAldebaranAlexey LeonovArmstrongArk RoyalAvengerBaracusBarracudaBaton RougeBelfastBenningtonBoxerChampionCheyenneCobraConcordCondorCormirCorvusCrockettDauntlessDefiant (I)Defiant (II)Defiant-CEagleEclipseFalkirkFargoFormidableFranklinGallantGalahadGauntletGawainGrantHalberdHavocHelenaHorizonHornetHurricaneIllustriousIncessantIwo JimaJavelinKantKingfisherLawLeeLeyteLoganLokiMan-o-WarMatadorMayaMedvedevMerrimackMichiganMongooseMonitor (I)Monitor (II)MonsoonMorganaMoscowMyrmidonNarcissusNeptuneNomadPendragonPleiadesPotemkinPythonQuillonRamsesRangerRavenRedoubtableRelentlessRenegadeRevereRockfordRomeSaladinSao Paulo (I)Sao Paulo (II)SavannahScorpionSiouxSiroccoSnake EyesSpitfireStalwartStrommingTenaciousThorTiconderogaTitanTreplevTriumphTritonTsunamiTurinValiant (I)Valiant (II)ValorousVanyaVictoriaVictoriousVigilantVoltaireWarspiteWaspWolverineZeppelin UFP emblem image. Seal of the Federation Starfleet.
other configurations Incursion-subclass: IncursionGallant-subclass: GallantVigilant-subclass: VigilantSao Paulo-subclass: IndefatigableNikeQuantumSao Paulo (II)
mirror universe Terran Rebellion Capital GainDefiantJadziaTerra Victor Seal of the Terrans.
Terran Empire DefiantQuantum Seal of the Terrans.
Species 8472 Poseidon Seal of the Undine.
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