 The development of MTDS coincided with the fielding of the MIM-23 HAWK Missile system, and the AN/TPQ-10 Radar Course Directing Central.The arrival of these highly technical systems, and the concurrent need for specialists to operate them, was a catalyst for the professionalization of aviation command and control in the Marine Corps.Recognizing the need for a separate headquarters to oversee these specialized units and the agencies and equipment they provide, the Marine Corps recommissioned the Marine Air Control Groups in September 1967.