World Library  
Flag as Inappropriate
Email this Article

25th Air Division

Article Id: WHEBN0008835302
Reproduction Date:

Title: 25th Air Division  
Author: World Heritage Encyclopedia
Language: English
Subject: Aerospace Defense Command, Western Air Defense Sector, Spokane Air Defense Sector, 9th Space Division, Curlew Air Force Station
Publisher: World Heritage Encyclopedia

25th Air Division

25th Air Division
Emblem of the 25th Air Division
Active 1948–1990
Country United States
Branch United States Air Force
Role Command and Control
Part of Tactical Air Command (ADTAC)
25th Air Division ADC AOR 1948-1959
25th Air Division ADC/TAC/NORAD Region AOR 1966-1979
25th Air Division/Northwest Air Defense Sector AOR, 1987-1990

The 25th Air Division is an inactive First Air Force, Tactical Air Command (ADTAC). It was inactivated on 30 September 1990 at McChord Air Force Base, Washington.


The command was activated on 25 October 1948, being the first Air Division for air defense. Its headquarters was at Silver Lake, near Everett, Washington under Continental Air Forces (ConAC). The 25th AD did not assume any command responsibilities until 1949 when it became an intermediate level command under the Air Defense Command, Western Air Defense Force. Its initial Area of Responsibility (AOR) was a large area of the northwest Continental United States, from the 103rd meridian west and north of the 42nd parallel north. This encompassed an area consisting of the states of Washington, Oregon, Idaho, Montana and Wyoming and the western parts of North and South Dakota as well as Nebraska.

During the 1950s the AOR of the 25th AD changed frequently, but its core area always included the area of Washington State west of the Cascade Mountains. On 1 January 1951, Air Defense Command regained major command status, and the 25th AD was one of four Air Divisions assigned to the new command. Later that year, on 15 September HQ 25th AD was moved from Silver Lake AFS to McChord AFB, near Tacoma, Washington.

Beginning on 1 January 1958, it the command organization for the Seattle Air Defense Sector Semi Automatic Ground Environment (SAGE) Data Center (DC-12) at McChord AFB. A few months later, on 1 September, the Portland Air Defense Sector, with its SAGE Direction Center (DC-13) at Adair AFS, Oregon also came under the 25th AD; on 8 September the Spokane Air Defense Sector and DC-15 at Larson AFB toned the 25th AD. In 1959, the Reno Air Defense Sector and DC-16 at Stead AFB, Nevada was also incorporated.

During the Cold War era, the 25th AD equipped, administered, trained and provided air defense combat ready forces within the northwestern United States. It exercised command jurisdiction over assigned units, installations, and facilities and provided and maintained facilities for the Air Division control center. In addition, the division and its subordinate units also participated in numerous tactical air defense training exercises. In the late 1950s, the Division also controlled United States-built radar stations in Western Canada as part of the Pinetree Line. These stations were turned over to the Royal Canadian Air Force in the early 1960s.

In May 1960, SAGE Combat Center Number 3 (CC-03) became operational at McChord AFB, bringing these separate Direction Centers under a unified center under the 25th AD. In July, DC-16 at Stead AFB was reassigned to the 28th Air Division at Hamilton AFB, California and the inactivation of the Western Air Defense Force brought the 25th AD directly under the control of Air Defense Command. In 1966 it was assigned to Headquarters, Fourth Air Force at Hamilton AFB, although it remained stationed at McChord AFB. It also replaced the Seattle Air Defense Sector in 1966. Assumed additional designation of 25th NORAD Region after activation of the NORAD Combat Operations Center at Cheyenne Mountain, Colorado and reporting was transferred to NORAD from ADC at Ent AFB in April 1966.

The division was a major part of Air Defense Command, and later Aerospace Defense Command (ADCOM) in 1968. In 1979 it was incorporated into Tactical Air Command with the inactivation of ADCOM as a major command. Under Air Defense, Tactical Air Command (ADTAC). In 1985 most active-duty units of ADCOM were inactivated or reassigned to other missions, and the air defense mission came under Air Force Reserve and Air National Guard units under First Air Force.

It continued its mission until 1990, when the 25 AD was inactivated, its mission and components becoming part of the First Air Force Northwest Air Defense Sector.


  • Established as 25 Air Defense Division on 27 September 1948.
Activated on 25 October 1948
Re-designated 25 Air Division (Defense) on 20 June 1949.
Inactivated on 1 February 1952
  • Organized on 1 February 1952
Re-designated: 25th Air Division (SAGE) on 1 March 1959
Re-designated :25th Air Division on 1 April 1966
Organized 1 April 1966, replacing Seattle Air Defense Sector
Assumed additional designations 25th NORAD/CONRAD Region, 1 April 1966
Assumed additional designation 25th ADCOM Region, 8 December 1978
Inactivated on 30 September 1990, assets transferred to Northwest Air Defense Sector.


Attached to Western Air Defense Force, 10 November 1949 – 1 August 1950




March AFB, California
McChord AFB, Washington




Minot AFB, North Dakota, 1 June 1983 – 1 December 1987
Larson AFB, Washington, 26 November 1952 – 18 August 1955
Grand Forks AFB, North Dakota, 1 April 1971 – 30 July 1974

See also


 This article incorporates public domain material from websites or documents of the Air Force Historical Research Agency.

  • A Handbook of Aerospace Defense Organization 1946 - 1980, by Lloyd H. Cornett and Mildred W. Johnson, Office of History, Aerospace Defense Center, Peterson Air Force Base, Colorado
  • Winkler, David F. (1997), Searching the skies: the legacy of the United States Cold War defense radar program. Prepared for United States Air Force Headquarters Air Combat Command.
  • Aerospace Defense Command publication, The Interceptor, January 1979 (Volume 21, Number 1)
  • Air Force Historical Research Agency: 25th Air Division
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Hawaii eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.