In the mirror universe, Ogat was a planet held by the Klingon Empire. In 2378, the Gorn Hegemony conquered Ogat with an expedtionary force to gauge the Klingons' reaction. Ten hours later, Regent Klag ordered the Second Fleet to retake Ogat, and a full-scale invasion of the Hegemony. Shortly after, the Klingons recaptured the planet and while the Fourth and Eighth Fleets conquered Seudath, Karazek and Ozannot. (ST - Mirror Universe novel: Rise Like Lions)