In the mirror universe, Seudath was a planet of the Gorn Hegemony. In 2378, following a provocative attack on Ogat by the Gorn, the Klingon Empire launched an invasion of the Hegemony. Within five weeks, the Klingons conquered Seudath, Karazek and Ozannot. The invasion was halted when the Terran Rebellion destroyed the Klingon SoHcha Fleet Yards and liberated Earth. (ST - Mirror Universe novel: Rise Like Lions)