Klingon Defense Force Command Headquarters was a structure that housed Klingon Defense Force Command, the central authority of the Klingon Defense Force. It was located in the First City on Qo'noS in a plaza overlooking the Qam-Chee River, approximately one half qelI'qam from the Great Hall. One of its key features was its qaDrav, a platform at the center of the plaza where challenges were traditionally issued and fought.