Aerospace Defense Command

Continental United States air defense forces during World War II were initially under the command of the four air districts – Northeast Air District, Northwest Air District, Southeast Air District, and Southwest Air District. The air districts were established on 16 January 1941, before the Pearl Harbor attack. The four air districts also handled USAAF combat training with the Army Ground Forces and "organization and training of bomber, fighter and other units and crews for assignments overseas". The air districts were redesignated on 26 March 1941 as the First Air Force, Second Air Force, Third Air Force, and Fourth Air Force. The First and Fourth Air Forces, through their interceptor commands, managed the civilian Aircraft Warning Service on the East and West coasts, respectively. The USAAF's Aircraft Warning Corps provided air defense warning with information centers that networked an area's "Army Radar Stations" which communicated radar tracks by telephone. The AWC information centers also integrated visual reports processed by Ground Observer Corps filter centers. AWC information centers notified air defense command posts of the "4 continental air forces" for deploying interceptor aircraft which used command guidance for ground-controlled interception. The USAAF inactivated the aircraft warning network in April 1944. Continental Air Forces Continental Air Forces (CAF) was activated on 12 December 1944, including the four Air Forces, to bring the continental air defense task under one command. AAF Regulation 20-1, dated 15 September 1945, specified the post-war CAF mission. For aircraft warning, in 1945 CAF had recommended "research and development be undertaken on radar and allied equipment for an air defense system [for] the future threat", e.g., a "radar [with] range of 1,000 miles, [to detect] at an altitude of 200 miles, and at a speed of 1,000 miles per hour". HQ AAF responded that "until the kind of defense needed to counter future attacks could be determined, AC&W planning would have to be restricted to the use of available radar sets". CAF's January 1946 Radar Defense Report for Continental United States recommended military characteristics for a post-war Air Defense System "based upon such advanced equipment", and the HQ AAF Plans reminded "the command that radar defense planning had to be based on the available equipment." Reorganization of Continental Air Forces began in 1945, when ground radar and interceptor plans were prepared for the transfer at CAF HQ in the expectation that 'it would become Air Defense Command.' CAF installations that were transferred to ADC included Mitchel Field (21 March 1946), Hamilton Army Airfield (21 March 1946), Myrtle Beach Army Air Field (27 March 1946), Shaw Field (1 April 1946), McChord Field (1 August 1946), Grandview Army Air Field (1 January 1952), Seymour Johnson Field (1 April 1956), and Tyndall Field (1 July 1957). ==Air Defense Command 1946==

Air Defense Command was activated on 21 March 1946 with the former CAF Fourth Air Force, the inactive Tenth Air Force, and the tbd's Fourteenth Air Force. Second Air Force was reactivated and added on 6 June 1946. In December 1946 the "Development of Radar Equipment for Detecting and Countering Missiles of the German A-4 type" was planned, part of the Signal Corps' Project 414A. The Distant Early Warning Line was "first conceived—and rejected—in 1946". A 1947 proposal for 411 radar stations and 18 control centers costing $600 million was the Project Supremacy plan for a postwar Radar Fence that was rejected by Air Defense Command since "no provision was made in it for the Alaska to Greenland net with flanks guarded by aircraft and picket ships [required] for 3 to 6 hours of warning time", and "Congress failed to act on legislation required to support the proposed system". (In the spring and summer of 1947, 3 ADC AC&W plans had gone unfunded.) By 1948 there were only 5 AC&W stations, including the Twin Lights station in NJ that opened in June and Montauk NY "Air Warning Station #3 (5 July)--cf. SAC radar stations, e.g., at Dallas & Denver Bomb Plots. ADC became a subordinate operational command of Continental Air Command on 1 December 1948 and on 27 June 1950, United States air defense systems began 24-hour operations two days after the start of the Korean War. By the time ADC was inactivated on 1 July 1950, ADC had deployed the Lashup Radar Network with existing radars at 43 sites. In addition, 36 Air National Guard fighter units were called to active duty for the mission. Reformation 1951 ADC was reinstated as a major command on 1 January 1951 at Mitchel Air Force Base, New York. A rudimentary command centre was established that year from a former hallway/latrine area. The headquarters was moved to Ent Air Force Base in Colorado Springs on 8 January 1951. It received 21 former ConAC active-duty fighter squadrons (37 additional Air National Guard fighter squadrons if called to active duty). ADC was also assigned the 25th, 26th 27th and 28th Air Divisions (Defense) ADC completed the Priority Permanent System network for Aircraft Warning and Control (ground-controlled interception) in 1952. Gaps were filled by additional Federal Aviation Administration (FAA) radar stations and the Ground Observation Corps (disbanded 1959). In May 1954, ADC moved their initial, rudimentary command center into a "much improved 15,000-square-foot concrete block" building with "main battle control center". During the mid-1950s, planners devised the idea of extending the wall of powerful land-based radar seaward with Airborne early warning and control units. This was done by equipping two wings of Lockheed RC-121 Warning Star aircraft, the 551st Airborne Early Warning and Control Wing, based at Otis Air Force Base, Massachusetts, and the 552nd AEWCW, based at McClellan Air Force Base, California, one wing stationed on each coast. The RC-121s, EC-121s and Texas Towers, it was believed, would contribute to extending contiguous east-coast radar coverage some 300 to 500 miles seaward. In terms of the air threat of the 1950s, this meant a gain of at least 30 extra minutes warning time of an oncoming bomber attack. ADC's Operation Tail Wind on 11–12 July tested its augmentation plan that required Air Training Command interceptors participate in an air defense emergency. A total of seven ATC bases actively participated in the exercise, deploying aircraft and aircrews and supporting the ADC radar net. As the USAF prepared to deploy the Tactical Air Command E-3 Sentry in the later 1970s, active-duty units were phased out EC-121 operations by the end of 1975. All remaining EC-121s were transferred to the Air Force Reserve, which formed the 79th AEWCS at Homestead Air Force Base, Florida in early 1976. The active duty force continued to provide personnel to operate the EC-121s on a 24-hour basis, assigning Detachment 1, 20th Air Defense Squadron to Homestead AFB as associate active duty crews to fly the Reserve-owned aircraft. Besides monitoring Cuban waters, these last Warning Stars also operated from NAS Keflavik, Iceland. Final EC-121 operations ended in September 1978. ==Air and Aerospace Defense Command==

of ADC's 5th Fighter-Interceptor Squadron near Mount Rushmore (lower right background) The United States Army Air Forces activated Air Defense Command (ADC) in 1946, with a Numbered Air Force of the former Continental Air Forces, from which it took its mission of air warning and air defense. In September 1947, it became part of the newly established United States Air Force. The command become a subordinate organization of Continental Air Command (ConAC) on 1 December 1948. ConAC gradually assumed direct charge of ADC air defense components, and ADC inactivated on 1 July 1950. But five months later, on 10 November 1950, Generals Vandenberg and Twining notified General Ennis C. Whitehead that "the Air Force had approved activation of a separate Air Defense Command [from CONAC] with headquarters on Ent." The new command's mission was to be to stop a handful of conventionally armed piston engine-powered bombers on a one-way mission. The command was formally reactivated on 1 January 1951. With advances in Soviet bombers, ADC completed improved radar networks and manned interceptors in the 1950s. At the end of the decade it computerized Air Defense Direction Centers to allow air defense controllers to more quickly review integrated military air defense warning (MADW) data and dispatch defenses (e.g., surface-to-air missiles in 1959). ADC began missile warning and space surveillance missions in 1960 and 1961, and established a temporary missile warning network for the 1962 Cuban Missile Crisis. In 1968 it was redesignated Aerospace Defense Command (ADCOM). In 1975, ADCOM became a specified command and the United States' executive agent in the North American Air Defense Command—the single CINCNORAD/CINCAD commanded both. ADCOM's last surface-to-air missiles were taken off alert in 1972, and the Federal Aviation Administration took over many of ADCOM's SAGE radar stations. ==Tactical Air Command and ADTAC==

On 1 October 1979 ADCOM interceptors/bases and remaining air warning radar stations transferred to Tactical Air Command (TAC), with these "atmospheric" units assigned to Air Defense, Tactical Air Command (ADTAC). ADCOM's missile warning and space surveillance installations transferred in 1979 to the Strategic Air Command's Directorate of Space and Missile Warning Systems (SAC/SX),) and the North American Aerospace Defense Command's Air Force Element, NORAD/ADCOM (AFENA), which was redesignated the Aerospace Defense Center. The command was inactivated on 31 March 1980. With the disestablishment of TAC and SAC in 1992, the Aerospace Defense Center, the ADCOM specified command organizations, along with SAC's missile warning and space surveillance installations. became part of Air Force Space Command (AFSPC). Air Force Space Command activated its headquarters in the same Chidlaw Building where ADCOM had been inactivated. Chronology of major events • 27 March 1946: The United States Army Air Force activates the Air Defense Command at Mitchel Field, New York • 1 December 1948: Air Defense Command became a component of Continental Air Command • 1 July 1950: Air Defense Command inactivated because the Continental Air Command gradually assumed full charge of United States air defense • 1 January 1951: Air Defense Command reestablished at Mitchel AFB • 8 January 1951: Air Defense Command headquarters moved to Ent Air Force Base, Colorado • 1 October 1953: The 4701st Airborne Early Warning and Control Squadron, the first AEW&C system, was activated at McClellan AFB, California. • 15 April 1957: Air Defense Command assigned operational control of the DEW Line and all atmospheric defense units of the inactivated Northeast Air Command. • 12 September 1957: NORAD is established at Ent AFB with Canadian Air Defense Command air defense units and United States Continental Air Defense Command air defense units • 1 December 1958: SAGE Combat Center No 1 at Hancock Field, New York became operational • 1 January 1959: The first BOMARC squadron, the 46th Air Defense Missile Squadron was activated at McGuire AFB, New Jersey. • 30 September 1960: ADC's BMEWS Central Computer and Display Facility at Ent AFB achieved initial operational capability, providing missile warning to SAC and The Pentagon • 1 July 1961: ADC took over the Laredo and Trinidad missile and space vehicle tracking stations • 15 January 1968: Air Defense Command is redesignated as Aerospace Defense Command (ADCOM) • 1 July 1975: Aerospace Defense Command designated a "Specified Command" taking over Continental Air Defense Command roles and responsibilities • 1 October 1975: Alaskan ADCOM Region established, Aerospace Defense Command assumes control of missile warning and space surveillance forces of Alaskan Air Command • 29 May 1979: The USAF made a public announcement of its plans to reorganize its aerospace defense forces. Consequently, the USAF inactivated ADCOM as a major command and reassigned its resources to other commands. • 31 March 1980: Aerospace Defense Command inactivated at the Chidlaw Building in Colorado Springs, Colorado. Interceptor Aircraft ADC had four day-type fighter squadrons (FDS) in 1946. The ADC interceptor force grew to ninety-three (93) active Air Force fighter interceptor squadrons, seventy-six (76) Air National Guard fighter interceptor squadrons, several U.S. Navy fighter squadrons, USAF and USN airborne early warning squadrons, radar squadrons, training squadrons, and numerous support units that have played important roles in our nation's defense. The first ADC interceptor, the P-61 Black Widow, did not have the capabilities to engage the Soviet Tu-4 bomber. Its successor, the F-82 Twin Mustang, was even more disappointing. It took a long time to get into production and did not perform well in inclement weather. The early jet fighters, such as the F-80 Shooting Star and F-84 Thunderjet, lacked all-weather capability and were deemed useless for air defense purposes. Much hope was placed on two jet-powered interceptors, the XP-87 Blackhawk and the XP-89 Scorpion. (Designations changed to XF-87 and XF-89.) They, in turn, also proved to be inadequate: the XF-87 was cancelled and the Scorpion underwent extensive redesign. The first-generation jets gave way to all-weather dedicated interceptor jets. The F-94 Starfire was pressed into service as an "interim" interceptor, and North American in 1949 pushed an interceptor version of the Sabre, the F-86D. Despite the demands its complexity made upon a single pilot, the F-86D was backed by senior Air Force officials. Some 2,504 would be built and it would in time be the most numerous interceptor in the Air Defense Command fleet, with more than 1,000 in service by the end of 1955 The F-86D was not ideal, however; its afterburner consumed a great deal of fuel in getting it to altitude, and the pilot was overburdened by cockpit tasks. The F-89D was modified to accept AIM-4 Falcon guided missiles (F-89H) and AIR-2 Genie atomic warhead rockets (F-89J) as armament. The F-86D was modified (F-86L) to include an FDDL SAGE data link that permitted automatic ground control. The F-86L and F-89H became available in 1956, and the F-89J in 1957. The North American F-108 Rapier was the first proposed successor to the F-106. It was to be capable of Mach 3 performance and was intended to serve as a long-range interceptor that could destroy attacking Soviet bombers over the poles before they could get near US territory. It was also to serve as the escort fighter for the XB-70 Valkyrie Mach-3 strategic bomber, also to be built by North American. The Air Force expected that the first F-108A would be ready for service by early 1963. An order for no less than 480 F-108s was anticipated. However, by mid-1959, the Air Force was already beginning to experience some doubts about the high cost of the Rapier program. The primary strategic threat from the Soviet Union was now perceived to be its battery of intercontinental ballistic missiles instead of its force of long-range bombers. Against intercontinental ballistic missiles, the F-108A interceptor would be completely useless. In addition, the Air Force was increasingly of the opinion that unmanned intercontinental ballistic missiles could accomplish the mission of the B-70 Valkyrie/F-108 Rapier combination much more effectively and at far lower cost. Consequently, the F-108A project was cancelled in its entirety on 23 September 1959, before any prototypes could be built. testing by AFSC's 4786th TS. Using the AN/ASG-18 from the F-108 Rapier program and Falcon missile developed for the F-108A, the Mach 3 interceptor was funded by Congress with $90 million for a 14 May 1965 USAF order of 93 F-12B aircraft (cancelled by SECDEF). In 1968, ADCOM began the phaseout of the F-101 and F-102 interceptors from active duty units, with both types mostly being transferred to the Air National Guard. The F-101 would remain in a limited role on active duty until 1982, serving in such roles as towed target carrier aircraft and simulated enemy radar contacts for Airborne Weapons Controller students training for duties aboard the E-3 Sentry AWACS. The F-102 would see service until the mid-1980s as the PQM-102 aerial target drone. The F-106 Delta Dart was the primary air defense interceptor aircraft for the US Air Force during the 1970s and early 1980s. It was also the last dedicated interceptor in U.S. Air Force service to date. It was gradually retired during the 1980s, though the QF-106 drone conversions of the aircraft were used until 1998 as aerial targets under the FSAT program. Interceptor gunnery training , Japan in 1958. Note the bright orange paint on the upper fuselage and wings B-57E Canberra dedicated Air Defense Command target towing aircraft were used for training of F-86D Sabre, F-94C Starfire, and F-89D Scorpion interceptors firing 2.75-inch Mk 4/Mk 40 Folding-Fin Aerial Rockets. Due to the nature of air-to-air weapon training requiring a large amount of air space, only a few locations were available for practice ranges. ADC assigned these aircraft to bases close to these large, restricted areas, and fighter-interceptor squadrons deployed to these bases for this type of "hot fire" training which took place in these ranges. The gunnery schools were located at Yuma AFB, Arizona (17th Tow Target Squadron (TTS)), and later moved to MacDill AFB, Florida where the training continued over the Gulf of Mexico. With the move to Florida, the 3d TTS was formed at George AFB, California which performed training over the Mojave Desert in Southern California. Additional units were located at Biggs AFB, near El Paso, Texas (1st TTS) and the 4756th TTS was located at Tyndall AFB, Florida to support the Fighter Weapons Center located there. ADC also supported overseas training at Johnson AB, Japan (the 6th Tow Target Squadron). From Johnson AB, B-57Es deployed to Clark AB, Philippines; Andersen AFB, Guam, Naha AB, Okinawa and Itazuke AB, Misawa AB and Yokota AB, all in Japan for training of the interceptor squadrons assigned to those bases. The 6th TTS was inactivated by late 1957 and the Canberra trainers were designated a flight of the 8th Bombardment Squadron at Johnson AB. In Europe, USAFE supported a squadron of B-57E gunnery trainers at Wheelus AB, Libya where European-based interceptors deployed for "live firing" over the vast desert range there. Defense Systems Evaluation "Faker", or simulated target aircraft flew mock penetrations into air defense sectors to exercise GDI stations, Air Defense Direction Centers, and interceptor squadrons. Initially using modified B-25 Mitchell and B-29 Superfortress bombers, the aircraft would fly attack profile missions at unexpected, random times and attempt to evade coverage by flying at low altitudes and randomly flying in different directions to confuse interceptors. The aircraft were modified to carry electronic countermeasures (ECM) gear to attempt to confuse radar operators. In 1957, the propeller-driven aircraft were phased out and replaced by Martin B-57 medium bombers which were being phased out of Tactical Air Command. Initially RB-57As from reconnaissance units were modified to have their former camera bays refitted to carry out the latest ECM systems to confuse the defenders. Wing racks, originally designed for bombs, now carried chaff dispensers and the navigator position was replaced with an Electronic Warfare Officer (EWO). The modified B-57s were designated as EB-57 (E for special electronic installation). Considerable realism would be generated into these simulated aggressor attack missions being flown by the B-57 crews. Often several EB-57s were used to form separate tracks and provide a coordinated jamming attack to complicate the testing. When inside the range of the GCI radar, and in anticipation of interception, chaff was dispensed to confuse the defense force and electronic pulses to jam radar signals were turned on. It was up to the defending interceptors and GCI stations to sort out the correct interception. and Clear AFS used each AN/FPS-50 to sweep 2 radar beams each ~1° in azimuth x 3.5° elevation (illustrated much less thick). Azimuth sweeping created a "Lower Fan" centered at 3.5° elevation and "Upper Fan" at 7° (both illustrated much higher) with "revisit time of 2 sec" for ICBM detection. 's Combined Operations Center took over command center operations in 1963 from the nearby Ent AFB "main battle control center" (screens show missile impact ellipses for an exercise.) Continental defense From 1 September 1954 until 1975, ADC was a component of the unified Continental Air Defense Command (CONAD) along with the Army's ARAACOM (1957 ARADCOM) and until 1965, the Navy's NAVFORCONAD. The USAF as the executive CONAD agent initially used ADC's: • General Benjamin Chidlaw as CINCONAD, • headquarters staff and ADC HQ building for the unified command staff, and • new blockhouse for the unified command center ADC'a Permanent System radar stations were used for CONAD target data, along with Navy picket ships (Atlantic and Pacific Barrier until 1965) and Army Project Nike "target acquisition radars". A CONAD reorganization that started in 1956 created a separate multi-service CONAD headquarters staff (with an Air Force Element), separated command of ADC from CINCONAD, and in 1957 added Alaskan Air Command and Northeast Air Command components to ADC Former NEAC installations in the smaller "Canadian Northeast Area" were transferred to the Canadian Air Defence Command. (e.g., the Hall Beach DEW Line station constructed 1955–1957--cf. Canada's Hopedale stations of the 1954 Pinetree Line and 1957 Mid-Canada Line.) 64th Air Division personnel were assigned to main stations of the 1957 DEW Line and annually inspected auxiliary/intermediate DEW stations maintained by the "DEW M&O Contractor." On 1 March 1957 CONAD reduced the number of ADC interceptor squadrons on alert for the Air Defense Identification Zone. "At the end of 1957, ADC operated 182 radar stations…32 had been added during the last half of the year as low-altitude, unmanned gap-filler radars. The total consisted of 47 gap-filler stations, 75 Permanent System radars, 39 semimobile radars, 19 Pinetree stations,…1 Lashup[-era] radar and a single Texas Tower". After the NORAD agreement was signed on 12 May 1958, ADC became a NORAD component. ;SAGE: The Semi-Automatic Ground Environment (SAGE) for radar operators was installed at ADC's general surveillance stations by deploying Burroughs AN/FST-2 Coordinate Data Transmitting Set electronics. Implementation of the SAGE Geographic Reorganization Plan of 25 July 1958 activated new ADC military installations, e.g., GATR stations for vectoring manned interceptors as well as BOMARC missile launch complexes with nearby GAT Facilities. On 20 December 1958 NORAD approved the "USAF ADC Plan" which included 10 Super Combat Centers (SCCs) in underground bunkers to replace 5 above-ground Combat Centers remaining to be built. Modification of FAA radars to the ARSR-1A configuration (Amplitron, "antenna gear box modification", etc.) were to be complete by November 1960 (e.g., at the Fort Heath radar station) and all 3 Texas Towers were in-service by April 1959 with ADC detachments/radars on offshore platforms near the New England coast, and the Continental Air Defense Integration North schedule for gap-filler radars included those for "P-20F, London, Ontario; C-4-C, Brampton, Ontario; C-5-C, Mt Carleton, New Brunswick; and C-6-D, Les Etroits. Quebec"—in the spring of 1959, ADC requested the Air Defense Systems Integration Division to study accelerating the scheduled 1962 deployment of those 4 sites. After the planned SCCs were cancelled in 1960, the SAGE System was augmented by the "pre-SAGE semiautomatic intercept system" for Backup Interceptor Control as at North Bend AFS in February 1962 (BUIC II first at North Truro AFS in 1966.) By 30 June 1958, the planned ADC anti-ICBM processing facility to coordinate the ABM missile fire was considered "the heart of the entire [planned] ballistic missile defense system (conceived to have Nike Zeus and Wizard missiles.) On 19 October 1959, HQ USAF assigned ADC the "planning responsibility" for eventual operations of the Missile Defense Alarm System to detect ICBM launches with infrared sensors on space vehicles. Missile warning and space surveillance ADC's BMEWS Central Computer and Display Facility was built as an austere network center (instead of for coordinating anti-ICBM fire) which "at midnight on 30 September I960…achieved initial operational capability" (IOC). On 1 July 1961 for space surveillance, ADC took over the Laredo Test Site and the Trinidad Air Station from Rome Air Development Center. The "1st Aero" cadre at the Hanscom AFB NSSCC moved 496L System operations in July 1961 to Ent's "SPADATS Center" in the annex of building P4. Operational BMEWS control of the Thule Site J RCA AN/FPS-50 Radar Sets transferred from RCA to ADC on 5 January 1962 (the 12MWS activated in 1967.) By 30 June 1962, integration of ADC's BMEWS CC&DF and the SPADATS Center was completed at Ent AFB, and the Air Forces Iceland transferred from Military Air Transport Service to ADC on 1 July 1962. The 9th ADD established the temporary 1962 "Cuban Missile Early Warning System" for the missile crisis. Responsibility for a USAFSS squadron's AN/FPS-17 radar station in Turkey for missile test monitoring transferred to ADC on 1 July 1963, the same date the site's AN/FPS-79 achieved IOC. By January 1963, ADC's Detachment 3 of the 9th Aerospace Defense Division (9th ADD) was providing space surveillance data from the Moorestown BMEWS station "to a Spacetrack Analysis Center at Colorado Springs." On 31 December 1965, Forward Scatter Over-the-Horizon network data from the 440L Data Reduction Center was being received by ADC for missile warning, and a NORAD plan for 1 April 1966 was for ADC to "reorganize its remaining 26th, 28th, 29th, and 73d Air Divisions into four air forces." The 1966 20th Surveillance Squadron began ADC's phased array operations with the Eglin AFB Site C-6 Project Space Track radar (the Eglin phased array's IOC was in 1969, and the North Dakota CMEWS "began passing" PARCS phased array data to NORAD in 1977 after being "modified for the ADCOM mission". After claiming in March 1958 that "the Army's ZEUS did not have the growth potential to handle possible enemy evasion decoy and countermeasure tactics", the USAF similarly identified by early 1959 that its planned Wizard missile was "not cost effective" against ICBM warheads.—the Army Zeus deployed successors against ICBMs (SAFEGUARD System, 1975–6) and space vehicles (Johnston Atoll, 1962–75). After tests of the 1959 High Virgo (at Explorer 5), 1959 Bold Orion (Explorer 6), and 1963 Project 505 (Nike Zeus) anti-satellite tests (the latter's nuclear burst destroyed a satellite), the Air Force Systems Command ASM-135 ASAT collided with a satellite in 1984. Consolidated C3 ADC's Consolidated Command. Control and Communications Program, FY 1965–1972 was an outgrowth of a 196x "ADC-NORAD PAGE Study" for replacing SAGE/BUIC with a Primary Automated Ground Environment (PAGE) . The program with a Joint DOD/FAA National Airspace System (NAS) resulted with DOD/FAA agreements for a common aircraft surveillance system, with the FAA "to automate its new National Airspace System (NAS) centers". ADC estimated its portion "would cost about $6 million, with annual operating, maintenance, and communication costs about $3.5 million" ("the first BUIC III was set to begin in April 1967 at Z-50, Saratoga Springs".) As the space mission grew the command changed its name, effective 15 January 1968, to Aerospace Defense Command, or ADCOM. Under ADCOM, emphasis went to systems for ballistic missile detection and warning and space surveillance, and the atmospheric detection and warning system, which had been in an almost continuous state of expansion and improvement since the 1950s, went into decline. BOMARC, for example, was dropped from the weapons inventory, and the F-101 and F-102 passed from the regular Air Force inventory into the National Guard. To save funds and manpower, drastic reductions were made in the number of long range radar stations, the number of interceptor squadrons, and in the organizational structure. By 1968 the DOD was making plans to phase down the current air defense system and transition to a new system which included an Airborne Warning and Control System (AWACS), Over-the-Horizon Backscatter (OTH-B) radar, and an improved F-106 interceptor aircraft. The changing emphasis in the threat away from the manned bomber and to the ballistic missile brought reorganization and reduction in aerospace defense resources and personnel and almost continuous turmoil in the management structure. The headquarters of the Continental Air Defense Command (CONAD) and ADC were combined on 1 July 1973. Six months later in February 1973, ADC was reduced to 20 fighter squadrons and a complete phaseout of air defense missile batteries. Continental Air Command was disestablished on 1 July 1975 and Aerospace Defense Command became a specified command by direction of the JCS. Reductions and reorganizations continued into the last half of the 1970s, but while some consideration was given to closing down the major command headquarters altogether and redistributing field resources to other commands, such a move lacked support in the Air Staff. ==Inactivation==

In early 1977 strong Congressional pressure to reduce management "overhead", and the personal conviction of the USAF Chief of Staff that substantial savings could be realized without a reduction in operational capability, moved the final "reorganization" of ADCOM to center stage. Two years of planning followed, but by late 1979 the Air Force was ready to carry it through. It was conducted in two phases: On 1 October 1979 ADCOM atmospheric defense resources (interceptors, warning radars, and associated bases and personnel) were transferred to Tactical Air Command. They were placed under Air Defense, Tactical Air Command (ADTAC), compatible to a Numbered Air Force under TAC. With this move many Air National Guard units that had an air defense mission also came under the control of TAC. ADTAC was headquartered at Ent Air Force Base, Colorado, with North American Aerospace Defense Command. In essence, Tactical Air Command became the old Continental Air Command. On the same date, electronic assets went to the Air Force Communications Service (AFCS). On 1 December 1979 missile warning and space surveillance assets were transferred to Strategic Air Command. On the same date the Aerospace Defense Center, a Direct Reporting Unit, was established from the remnants of ADCOM headquarters. ADCOM, as a specified command, continued as the United States component of NORAD, but the major air command was inactivated on 31 March 1980. The unit designation of the MAJCOM reverted to the control of the Department of the Air Force. ==Commanders==

• Lt. Gen George Stratemeyer • Maj. Gen Gordon Saville • Lt. Gen Ennis Whitehead • Gen Benjamin W. Chidlaw • Maj. Gen Frederick Smith Jr. – from 31 May 1955 • Gen Earle Partridge (acting) • Lt. Gen Joseph H. Atkinson – became ADC commander on 22 September • Lt. Gen Robert Lee • Lt. Gen Herbert Thatcher • Lt. Gen Arthur Agan ==Lineage==

• Established as Air Defense Command on 21 March 1946 : Activated as a major command on 27 March 1946 : Became a subordinate operational command of Continental Air Command on 1 December 1948 : Discontinued on 1 July 1950 • Reestablished as a major command, and organized, on 1 January 1951 : Became a specified command in 1975 : Redesignated Aerospace Defense Command on 15 January 1968 : Major Command inactivated on 31 March 1980 ==Components==

Air Defense Forces • Central Air Defense Force (CADF) : Activated on 1 March 1951 at Kansas City, Missouri : Moved to Grandview AFB, 10 March 1954 : Station redesignated Richards-Gebaur AFB, 27 April 1952 : Inactivated, 1 January 1960 • Eastern Air Defense Force (EADF) : Activated by Continental Air Command on 1 September 1949 at Mitchel AFB, New York : Moved to Stewart AFB and assigned to Air Defense Command on 1 January 1951 : Inactivated, 1 January 1960 • Western Air Defense Force (WADF) : Activated by Continental Air Command on 1 September 1949 at Hamilton AFB, California : Reassigned to Air Defense Command, 1 January 1951 : Inactivated, 1 July 1960 Air Forces • First Air Force : Assigned to Air Defense Command, 27 March 1946 at Mitchel Field, New York : Moved to Fort Slocum, New York, 3 June 1946 : Reassigned to Continental Air Command, 1 December 1948 : Reassigned to Air Defense Command, 1 April 1966 : Inactivated, 31 December 1969 • Second Air Force : Reactivated on 6 June 1946 at Fort Crook, Nebraska : Assigned to Air Defense Command : Inactivated, 1 July 1948 • Fourth Air Force : Assigned to Air Defense Command, 21 March 1946 at March Field, California : Moved to Hamilton Field, California on 19 June 1946 : Reassigned to Continental Air Command, 1 December 1948 : Discontinued, 1 September 1960 : Reactivated 1 April 1966 and assigned to Air Defense Command : Inactivated, 30 September 1969 • Tenth Air Force, 21 March 1946 – 1 December 1948; 20 January 1966 – 8 October 1976 : Reactivated 27 May 1946 at Brooks Field, Texas : Assigned to Air Defense Command : Reassigned to Continental Air Command, 1 December 1948 : Inactivated, 1 September 1960 : Reactivated 1 April 1966 and assigned to Air Defense Command : Assigned to Richards-Gebaur AFB : Inactivated, 30 September 1969 • Eleventh Air Force* : Activated 13 June 1946 at Olmsted Field, Middletown, Pennsylvania : Assigned to Air Defense Command : Inactivated, 1 July 1948 • Fourteenth Air Force, 21 March 1946 – 1 December 1948; 20 January 1966 – 8 October 1976 : Reactivated 24 May 1945 at Orlando Air Base, Florida : Assigned to Air Defense Command : Reassigned to Continental Air Command, 1 December 1948 : Inactivated, 1 September 1960 : Reactivated 1 April 1966 and assigned to Air Defense Command : Assigned to Gunter AFB, Alabama : Redesignated Fourteenth Aerospace Force, 1 July 1968 : Moved to Ent AFB, Colorado : Inactivated, 1 October 1976 • Air Forces Iceland : Assigned to Air Defense Command from Military Air Transport Service, 1 July 1962 : Stationed at Keflavik Airport, Iceland : Assigned to 64th Air Division : Transferred to: 26th Air Division, 1 July 1963 : Transferred to: Goose Air Defense Sector, 4 September 1963 : Transferred to: 37th Air Division, 1 April 1966 : Transferred to: 21st Air Division, 31 December 1969 : Reassigned to Tactical Air Command, 1 October 1979 .Note: Assigned to Olmsted AFB, Pennsylvania, but never equipped or manned. Not to be confused with Eleventh Air Force, which was assigned to Alaskan Air Command Regions • Alaskan ADCOM Region : Designated and activated at Elmendorf AFB, Alaska, 1 October 1975 : Missile warning and space surveillance forces reassigned to Strategic Air Command, 1 December 1979 : Redesignated as Alaska NORAD Region (ANR), 14 June 1983 :: Operational atmospheric defense units under operational control of Eleventh Air Force • 20th ADCOM Region : Designated and activated at Fort Lee AFS, Virginia, 8 December 1978 : Supplementary ADCOM designation of 20th Air Division • 21st ADCOM Region : Designated and activated at Hancock AFS, New York, 8 December 1978 : Supplementary ADCOM designation of 21st Air Division • 23d ADCOM Region : Designated and activated at Duluth AFS, Minnesota, 8 December 1978 : Supplementary ADCOM designation of 23d Air Division • 24th ADCOM Region : Designated and activated at Malmstrom AFB, Montana, 8 December 1978 : Supplementary ADCOM designation of 24th Air Division • 25th ADCOM Region : Designated and activated at McChord AFB, Washington, 8 December 1978 : Supplementary ADCOM designation of 25th Air Division • 26th ADCOM Region : Designated and activated at Luke AFB, Arizona, 8 December 1978 : Supplementary ADCOM designation of 26th Air Division Air Divisions • 8th Air Division (Aircraft Early Warning & Control) : Activated 1 May 1954 at McClellan AFB, California : Assigned to Western Air Defense Force : Transferred to Air Defense Command, 1 May 1955 : Inactivated, 1 July 1957 • 9th Air Division (Defense) : Activated 8 October 1954 at Geiger Field, Washington : Assigned to Western Air Defense Force : Inactivated, 15 August 1958 : Reactivated on 15 July 1961 as 9th Aerospace Air Division at Ent AFB, Colorado : Assigned to Air Defense Command : Designated 9th Aerospace Defense Division by 31 May 1963 : Discontinued, 1 July 1968 • 20th Air Division : Activated on 8 October 1955 at Grandview AFB, Missouri : Assigned to Central Air Defense Force : Station renamed Richards-Gebaur AFB, 27 April 1957 : Inactivated 1 January 1960 : Reactivated on 1 April 1966 at Truax Field, Wisconsin : Assigned to Tenth Air Force : Discontinued 31 December 1967 : Reactivated on 19 November 1969 at Fort Lee AFS, Virginia : Assigned to Air Defense Command : Reassigned to Tactical Air Command, 1 October 1979 • 21st Air Division : Activated 20 January 1966 : Organized at McGuire AFB, New Jersey 1 April 1966 : Assigned to First Air Force : Discontinued and inactivated 31 December 1967 : Reactivated on 19 November 1969 at Hancock AFS, New York : Assigned to Air Defense Command : Reassigned to Tactical Air Command, 1 October 1979 • 23d Air Division : Activated 19 November 1969 at Duluth AFS, Minnesota : Assigned to First Air Force : Reassigned to Air Defense Command on 1 December 1969 : Reassigned to Tactical Air Command, 1 October 1979 • 24th Air Division : Activated 19 November 1969 at Malmstrom AFB, Montana : Assigned to Tenth Air Force : Reassigned to Air Defense Command on 1 December 1969 : Reassigned to Tactical Air Command, 1 October 1979 • 25th Air Division : Activated 25 October 1948 as 25th Air Division (Defense) at Silver Lake, Washington : Assigned to Fourth Air Force : Reassigned to Western Air Defense Force, 1 February 1950 : Moved to McChord AFB, 15 September 1951 : Redesignated 25th Air Division (SAGE), 1 March 1959 : Reassigned to Air Defense Command on 1 July 1960 : Reassigned to Fourth Air Force, 1 April 1966 : Reassigned to Tenth Air Force, 1 April 1966 : Reassigned to Aerospace Defense Command, 1 December 1969 : Reassigned to Tactical Air Command, 1 October 1979 • 26th Air Division : Activated 16 November 1948 at Mitchel AFB, New York : Assigned to First Air Force : Moved to Roslyn AFS, New York 18 April 1949 : Redesignated 26th Air Division (Defense), 20 June 1949 : Reassigned to Eastern Air Defense Force, 1 September 1950 : Redesignated 26th Air Division (SAGE), 8 August 1958 and moved to Syracuse AFS, New York : Transferred to Air Defense Command on 1 August 1959 : Moved to Stewart AFB, New York, 15 June 1964 : Redesignated 26th Air Division, 20 January 1966 and moved to Adair AFS, Oregon : Inactivated, 30 September 1969 : Reactivated 19 November 1969 at Luke AFB, Arizona : Reassigned to Tactical Air Command, 1 October 1979 • 27th Air Division : Activated as 27th Air Division (Defense) on 20 November 1950 at Norton AFB, California : Assigned to Western Air Defense Force : Inactivated, 1 October 1959 : Organized as 27th Air Division on 1 April 1966 at Luke AFB, Arizona : Assigned to Fourth Air Force : Reassigned to Tenth Air Force on 15 September 1969 : Inactivated 19 November 1969 • 28th Air Division : Assigned to Western Air Defense Force on 1 January 1951 as 28th Air Division (Defense) : Assigned to Hamilton AFB, California : Redesignated as 28th Air Division (SAGE) and transferred to Air Defense Command, 1 July 1960 : Redesignated 28th Air Division, 1 April 1966 : Moved to Malmstrom AFB, Montana and assigned to Tenth Air Force, 1 April 1966 : Inactivated 19 November 1969 • 29th Air Division : Activated 1 March 1951 at Great Falls AFB, Montana : Assigned to Western Air Defense Force : Transferred to Central Air Defense Force, 16 February 1953 : Great Falls AFB renamed Malmstrom AFB, Montana, 1 October 1955 : Redesignated as 29th Air Division (SAGE) and transferred to Air Defense Command, 1 July 1960 : Moved to Richards-Gebaur AFB, Missouri, 1 July 1961 : Redesignated 29th Air Division, 1 April 1966 : Moved to Duluth AFS, Minnesota, and assigned to Tenth Air Force, 1 April 1966 : Reassigned to First Air Force on 15 September 1969 : Inactivated 19 November 1969 • 30th Air Division, : Activated on 16 December 1949 as 30th Air Division (Defense) at Selfridge AFB, Michigan : Assigned to Air Defense Command : Moved to Willow Run AFS, Michigan on 1 April 1952 : Assigned to Eastern Air Defense Force, 1 April 1952 : Redesignated 30th Air Division (SAGE), 1 April 1959 and moved to Truax Field, Wisconsin : Reassigned to Air Defense Command on 1 July 1959 : Redesignated 30th Air Division and moved to Sioux City AFS, Iowa (w/o p/e), 1 April 1966 : Reassigned to Tenth Air Force, 1 April 1966 : Discontinued 18 September 1968 • 31st Air Division : Activated on 8 October 1950 as 31st Air Division (Defense) at Selfridge AFB, Michigan : Assigned to Eastern Air Defense Force : Reassigned to Air Defense Command on 1 January 1951 : Moved to Snelling AFS, Minnesota on 18 December 1950 : Reassigned to Central Air Defense Force, 20 May 1950 : Inactivated 1 January 1960 : Organized at Oklahoma City AFS, Oklahoma on 1 April 1966 : Assigned to Fourteenth Air Force, 1 April 1966 : Reassigned to Tenth Air Force on 1 July 1968 : Inactivated on 31 December 1969 • 32d Air Division : Assigned on 1 January 1951 to Eastern Air Defense Force at Stewart AFB, New York : Moved to Syracuse AFS, New York, 15 February 1952 : Inactivated on 15 August 1958 : Reactivated on 15 November 1958 as 32d Air Division (SAGE) at Dobbins AFB, Georgia : Assigned to Eastern Air Defense Force : Reassigned to Air Defense Command, 1 August 1959 : Moved to Oklahoma City AFS, Oklahoma, 1 August 1961 : Discontinued 4 September 1963 : Organized at Gunter AFB, Alabama, 1 April 1966 : Assigned to Fourteenth Air Force : Reassigned to Tenth Air Force, 1 July 1968 : Inactivated 31 December 1969 • 33d Air Division : Activated on 19 March 1951 as 33d Air Division (Defense) at Tinker AFB, Oklahoma : Assigned to Eastern Air Defense Force : Reassigned to Central Air Defense Force, 20 May 1951 : Moved to Oklahoma City AFS, Oklahoma, 1 July 1956 : Redesignated 33d Air Division (SAGE) and moved to Richards-Gebaur AFB, Missouri, 1 January 1960 : Reassigned to Air Defense Command : Discontinued 1 July 1961 : Organized on 1 April 1966 as 33d Air Division at Fort Lee AFS, Virginia : Assigned to First Air Force : Inactivated 19 November 1969 • 34th Air Division : Activated on 5 January 1951 at Kirtland AFB, New Mexico : Assigned to Western Air Defense Force : Reassigned to Central Air Defense Force 15 February 1953 : Inactivated 1 January 1960 : Organized at Custer AFS, Michigan, 1 April 1966 : Assigned to First Air Force : Inactivated 31 December 1969 • 35th Air Division : Activated on 1 July 1951 at Kansas City, Missouri : Assigned to Central Air Defense Force : Moved to Dobbins AFB, Georgia, 1 September 1951 : Reassigned to Eastern Air Defense Force, 10 April 1955 : Inactivated 15 November 1958 : Organized on 1 April 1966 at Syracuse AFS, New York : Inactivated 19 November 1968 • 36th Air Division : Activated 1 April 1966 at Topsham AFS, Maine : Assigned to First Air Force : Inactivated 30 September 1969 • 37th Air Division : Activated on 10 October 1951 at Lockborne AFB, Ohio under Strategic Air Command : Moved to Truax Field, Wisconsin 8 September 1955 and transferred to Air Defense Command : Assigned to Eastern Air Defense Force : Inactivated 1 April 1959 : Organized on 1 April 1966 at Goose AFB, Labrador, Canada : Assigned to First Air Force : Reassigned to Aerospace Defense Command, 1 December 1969 : Inactivated 10 June 1970 • 58th Air Division (Defense) : Activated 8 September 1955 at Wright-Patterson AFB, Ohio : Assigned to Eastern Air Defense Force : Inactivated 1 February 1959 • 64th Air Division : Transferred on 1 April 1957 to Air Defense Command from Northeast Air Command : Assigned to Pepperrell AFB, Newfoundland : Moved to Stewart AFB, New York, 26 May 1960 : Discontinued, 1 July 1963 • 73d Air Division : Activated 1 July 1957 as 73d Air Division (Weapons) at Tyndall AFB, Florida : Assigned to Air Defense Command : Redesignated 73d Air Division, 1 March 1963 : Discontinued 1 April 1966 • 85th Air Division : Activated 8 September 1955 at Andrews AFB, Maryland : Assigned to Eastern Air Defense Force : Inactivated 1 September 1958 Air Defense Sectors • Albuquerque Air Defense Sector : Activated on 1 January 1960 at Kirtland AFB, New Mexico : Assigned to 33d Air Division : Discontinued 1 November 1960 • Bangor Air Defense Sector : Activated on 8 January 1957 at Topsham AFS, Maine : Assigned to 32d Air Division : Reassigned to 26th Air Division, 15 August 1958 : Discontinued 1 April 1966 • Boston Air Defense Sector : 4622d Air Defense Wing (SAGE) redesignated 8 January 1957 : Activated at Stewart AFB, New York : Assigned to 26th Air Division : Moved to Syracuse AFS, New York 1 April 1966 : Discontinued 1 April 1966 • Chicago Air Defense Sector : 4628th Air Defense Wing redesignated 8 March 1957 : Activated at Truax Field, Wisconsin : Assigned to 37th Air Division : Reassigned to 30th Air Division, 1 April 1959 : Discontinued 1 April 1966 • Detroit Air Defense Sector : 4627th Air Defense Wing redesignated, 8 January 1957 : Activated at Custer AFS, Michigan : Assigned to 30th Air Division : Reassigned to 26th Air Division, 4 September 1963 : Discontinued 1 April 1966 • Duluth Air Defense Sector : Activated 8 October 1957 at Duluth AFS, Minnesota : Assigned to 37th Air Division (EADF) : Reassigned to 31st Air Division (CADF), 20 December 1957 : Reassigned to 37th Air Division, 1 January 1959 : Reassigned to 30th Air Division, 1 April 1959 : Discontinued 1 April 1966 • Goose Air Defense Sector : Activated on 1 April 1960 at Goose AFB, Labrador, Canada : Assigned to 64th Air Division : Reassigned to 26th Air Division (SAGE), 1 July 1963 : Discontinued on 1 April 1966 • Grand Forks Air Defense Sector : Activated on 8 December 1957 at Grand Forks AFB, North Dakota : Assigned to 31st Air Division : Reassigned to 29th Air Division, 1 January 1959 : Discontinued on 1 December 1963 • Great Falls Air Defense Sector : Activated on 1 March 1959 at Malmstrom AFB, Montana : Assigned to 29th Air Division : Discontinued on 1 April 1966 • Kansas City Air Defense Sector : Activated on 1 January 1960 at Richards-Gebaur AFB, Missouri : Assigned to 33d Air Division : Reassigned to 29th Air Division, 1 July 1961 : Discontinued 1 January 1962 • Los Angeles Air Defense Sector : Activated on 15 February 1959 at Norton AFB, California : Assigned to 27th Air Division : Reassigned to Western Air Defense Force, 1 October 1959 : Reassigned to 28th Air Division, 1 July 1960 : Reassigned to Fourth Air Force, 1 April 1966 : Discontinued 25 June 1966 • Minot Air Defense Sector : Activated on 1 April 1959 at Minot AFB, North Dakota : Assigned to 29th Air Division : Discontinued 15 August 1963 • Montgomery Air Defense Sector : Activated on 8 September 1957 at Gunter AFB, Alabama : Assigned to 35th Air Division : Reassigned to 32d Air Division, 15 November 1958 : Reassigned to 26th Air Division (SAGE), 1 July 1963 : Assigned to Air Defense Command, 1 October 1964 : Discontinued 1 April 1966 • New York Air Defense Sector : 4621st Air Defense Wing (SAGE) redesignated, 8 January 1957 : Assigned to McGuire AFB, New Jersey : Assigned to 26th Air Division : Discontinued 1 April 1966 • Oklahoma City Air Defense Sector : Activated on 1 January 1960 at Oklahoma City AFS, Oklahoma : Assigned to 33d Air Division : Reassigned to 32d Air Division, 1 July 1961 : Discontinued 1 September 1961 : Reactivated 25 June 1963 at Oklahoma City AFS : Assigned to 29th Air Division (SAGE) : Discontinued 1 April 1966 • Phoenix Air Defense Sector : Activated on 15 June 1959 at Luke AFB, Arizona : Assigned to Western Air Defense Force : Reassigned to 28th Air Division, 1 July 1960 : Discontinued 1 April 1966 • Portland Air Defense Sector : Activated on 1 September 1958 at Adair AFS, Oregon 25th Air Division : Discontinued 1 April 1966 • Reno Air Defense Sector : Activated on 15 February 1959 at Stead AFB, Nevada : Assigned to 25th Air Division : Reassigned to 28th Air Division, 1 July 1960 : Reassigned to Fourth Air Force, 1 April 1966 : Discontinued 25 June 1966 • San Francisco Air Defense Sector : Activated on 15 February 1959 at Beale AFB, California : Assigned to 28th Air Division : Discontinued 1 August 1963 • Sault Sainte Marie Air Defense Sector : Activated on 8 November 1958 at K. I. Sawyer AFB, Michigan : Assigned to 37th Air Division : Reassigned to 30th Air Division, 1 April 1959 : Discontinued 15 December 1963 • Seattle Air Defense Sector : Activated on 8 January 1958 at McChord AFB, Washington : Assigned to 25th Air Division : Discontinued 1 April 1966 • Sioux City Air Defense Sector : Activated on 1 October 1959 at Sioux City AFS, Iowa : Assigned to 20th Air Division : Reassigned to 33d Air Division, 1 January 1960 : Reassigned to 29th Air Division, 1 July 1961 : Discontinued 1 April 1966 • Spokane Air Defense Sector : Activated on 8 September 1958 at Larson AFB, Washington : Assigned to 25th Air Division : Discontinued 1 September 1963 • Syracuse Air Defense Sector : 4624th Air Defense Wing (SAGE), redesignated 8 January 1957 : Activated at Syracuse AFS, New York : Assigned to 32d Air Division : Reassigned to 25th Air Division, 15 August 1958 : Discontinued 4 September 1963 • Washington Air Defense Sector : 4625th Air Defense Wing (SAGE) redesignated 8 January 1957 : Activated at Fort Lee AFS, Virginia : Assigned to 85th Air Division : Reassigned to 26th Air Division, 1 September 1958 : Discontinued 1 April 1966 Other • Air Force Element, NORAD/ADCOM (AFENA) : Activated tbd : Redesignated a Direct Reporting Unit of USAF as Aerospace Defense Center, 1 December 1979 • Air Defense Weapons Center : Organized at Tyndall AFB, Florida, 31 October 1967 : Assigned to Air Defense Command : Transferred to Tactical Air Command, 1 October 1979 • Aerospace Defense Command Combat Operations Center (COC) : Designated and activated as NORAD Combat Operations Center, 21 April 1976 : Assigned to Cheyenne Mountain Complex City, Colorado : Assigned to Aerospace Defense Command, 21 April 1976 : Redesignated ADCOM CONIC, 30 June 1976 : Transferred to Tactical Air Command, 1 October 1979 • Cheyenne Mountain Support Group - Unit activated 1 October 1981. Its mission was to provide for upkeep, maintenance, ana management of the Cheyenne Mountain Complex. The 4800 Special SEcurity Squadron was to provide physical protection; the 4801 Civil Engineering Squadron was to administer and operate real property facilities. ==References==