Don'zali IV was an agricultural colony of the Klingon Empire. K'zeq, a former commander of a prison facility, relocated to Don'zali IV after retiring from military service sometime after 2279. Koloth, along with James T. Kirk and Hikaru Sulu tracked K'zeq to Don'zali IV in 2287, seeking information about Federation prisoners he had kept. (TOS novel: In the Name of Honor)