Memory Beta, non-canon Star Trek Wiki
Memory Beta, non-canon Star Trek Wiki

Klingon fleet going into battle.

In the mirror universe, the Fourth Fleet was a Klingon Empire battle fleet, a military unit consisting of Klingon Defense Force starships.

History and specifics[]

The fleet was deployed at the Klingon-Romulan border. In the year 2378, Regent Klag retasked the Fourth and Eighth Fleets with the invasion of the Gorn Hegemony following the Gorn's brazen attack on Ogat. The fleets conquered Seudath, Karazek and Ozannot, and General Goluk expected to land forces on Gornar six weeks later but the invasion was halted when the Terran Rebellion destroyed the Klingon SoHcha Fleet Yards and liberated Earth. (ST - Mirror Universe novel: Rise Like Lions)

Known engagements[]

  • Gorn-Klingon War
    • invasions of Seudath, Karazek and Ozannot



Klingon units
Klingon Defense Force fleets 5th FleetGho'vaD Defense FleetHegh yan Strike FleetQabjech Exploratory FleetQo'noS Home FleetRoptargh Heavy Assault FleetSuk'valt Strike Fleet Klingon icon image.
Battle groups Battle Group 1Battle Group 5Battle Group 10123rd Assault FlotillaChoS Battle Group
Divisions 3rd Frontier Naval Division
Squadrons 44th Cruiser Squadron123rd Red Wing123rd Gold Wing123rd Steel Wing126th Escort Squadron7703rd Escort SquadronKaz's SquadronKija's SquadronKilistz's SquadronKinin's SquadronKolar's SquadronKuln's SquadronSecond Triangle Squadron
Other units 4th Frontier Force16th Service Group81st Transport Group688th Patrol GroupThreat Eradication Force
Imperial Marines units 1285th Marine Regiment1650th Marine RegimentDeathstrike
Other troops and guard units 15th SquadAssault squadHonor GuardHouse Pegh forcesPlanetary RegimentsYan-Isleth
Klingon Alliance fleets
(mirror universe)
2nd Fleet4th Fleet8th Fleet