This page contains information regarding Star Trek: Discovery, and thus may contain spoilers.
The Halee system was a planetary system in the territory of the Klingon Empire, located within the Beta Quadrant. The system was home to as least one planet, which was suggested as an exile option for renegade Klingons who wished to find honor by fighting to the death.
In 2256, this star's location was labeled on the star chart "Alpha/Beta Quadrant Overview" in the ready room aboard the USS Discovery. The star was located in the territory of the Klingon Empire. (DIS: "Magic to Make the Sanest Man Go Mad", "The War Without, The War Within")
In 2364, Lieutenant Worf recommended this system to Captain K'Nera as an option to a dishonorable death by execution for Korris and Konmel. K'Nera agreed that under any other condition, this would be preferable. However, due to the conditions at hand – the alliance with the Federation and the threat these two Klingons posed to it – there was no other option for them. (TNG: "Heart of Glory")