NORAD
The "establishment of command headquarters" for NORAD was at Ent AFB on September 12, 1957, and the NORAD command center received SAGE Radar Network data from 8 regional AN/FSQ-8 systems. Adjacent to the NORAD center was the SPADATS Operation Center with the 496L Space Detection and Tracking System which began operations in July 1961 (building P4's annex, a former hospital building). Some of Ent's operations/units moved to the 1963 Chidlaw Building ½ mi (¾ km) south-southeast of Ent. (e.g., the COC to the 1963 NORAD Combined Operations Center.)The SPADATS mission remaining at Ent began the move to the Cheyenne Mountain "Group III Space Defense Center" in April 1966 (fully operational at 0001Z, 6 February 1967). ADCOM's Interceptor safety magazine was being published at Ent in 1968 and in 1975, the base was renamed the "Ent Annex" of Peterson Air Force Base on April 1.
Read more about this topic: Ent Air Force Base