Klingon Empire

In a parallel universe, the Klingon Empire was an interstellar empire led by the Klingon species. Its capital was the First City on the Klingon homeworld Qo'noS. During the 24th century, it was allied with the United Federation of Planets.

In a possible future shown to Captain Jean-Luc Picard by the Eleventh Doctor, the population of Qo'noS was converted by the Cybermen. (COMIC: Assimilation²)