K'Kaarr was a strategically important Klingon planet in the 23rd century.
The planet K'Kaar was the closest Klingon base to Romulan territory, which made it the scene of a number of intense battles over the years. The Klingon Empire maintained a permanent military presence on the planet, which had few civilians. The small land masses on the world were been turned into barracks for ground troops. Usually there were at least 10 Battle Groups in the system, with other groups passing nearby all the time. (FASA RPG module: The Klingons: Game Operation Manual)