The Klingon Empire is a fictional governing body featured in the Star Trek multimedia franchise. It relates to the alien race known as Klingons, who are often represented as antagonists in various related projects.
The Klingon Empire was first introduced in the original Star Trek television series in the season one episode "Errand of Mercy". The Klingons were a conquering race who prided themselves on honor, strength and the glory of combot. They had established a vast Empire throughout numerous star system and their home world was a planet called Qo'noS.