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Caleb IV was a planet located somewhere in the space of the galaxy's Alpha or Beta Quadrants, the fourth planet in orbit of the Caleb star system. Caleb IV was the location of a Federation outpost near the Klingon border. (DS9 episode: "Once More Unto the Breach")


In 2270, Kor commanded the IKS Klothos during the Klingon Empire's victory over the Federation at the planet. (DS9 episode: "Once More Unto the Breach", ST website:, ST references: Klingon Bird of Prey Owners' Workshop Manual, The Klingon Art of War: Ancient Principles of Ruthless Honor)

This battle, the Battle of Caleb IV, had Federation starships lead by Admiral Issac Garrett attempt to drive off Klingons attacking communication arrays. However, it ended up being an ambush as Klingons made the first usage of a cloaking device on their starships. One starship captain, aided by the Temporal Agent Daniels, boarded the Klothos, sabotaged the ship and rescued the captured Federation ships before serving as a decoy to allow the other ships to escape. The ship was lost with all hands. (STO - Agents of Yesterday mission: "The Battle of Caleb IV")

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planets visited by ships named Yorktown
United Earth, Earth Starfleet USS Yorktown (Daedalus-class) Proxima CentauriAndoria Terran emblem. Terran emblem.
Federation, Starfleet USS Yorktown (Constitution-class) EarthAretaGamma ErigenaSicon PrimeSicon IIICaleb IVSigma Thernia 3BAlpha Tau IVSigma Thernia 3BLycos VRegula 1* • Earth* • EarthTriskelionOutpost 43Constanthus UFP emblem image. Assignment patch image.
USS Yorktown (Excelsior-class) Benzar
USS Yorktown (Zodiac-class) Theta Omicron IV
USS Yorktown (NCC-97005 Odyssey-class) MarsEarth
USS Yorktown (NCC-98300 Odyssey-class) Earth
*alternate reality

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