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Chicago Air Defense Sector


Emblem of the Chicago Air Defense Sector
Active 1957-1966
Country United States
Branch United States Air Force
Role Air Defense
Part of Air Defense Command
Map of Chicago ADS

The Chicago Air Defense Sector (CADS) is an inactive United States Air Force organization. Its last assignment was with the Air Defense Command 30th Air Division, being stationed at Truax Field, Wisconsin. It was inactivated on 1 April 1966.

CADS was established in March 1957 at Truax Field, Wisconsin, assuming control of former ADC Central Air Defense Force units with a mission to provide air defense of Illinois; Indiana; most of Iowa and northern Missouri. The organization provided command and control over several aircraft and radar squadrons. A Semi Automatic Ground Environment (SAGE) control center were also located at Truax.

The Sector was inactivated 1 April 1966 as part of ADC reorganization and consolidation, the command being redesignated as the 20th Air Division; and its units in Indiana were reassigned to the 34th Air Division.





  • Established as Chicago Air Defense Sector on 8 Mar 1957
Inactivated on 1 Apr 1966; redesignated as 20th Air Division.





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

  • Maurer, Maurer (1983). Air Force Combat Units Of World War II. Maxwell AFB, Alabama: Office of Air Force History. ISBN 0892010924.
  • Ravenstein, Charles A. (1984). Air Force Combat Wings Lineage and Honors Histories 1947-1977. Maxwell AFB, Alabama: Office of Air Force History. ISBN 0912799129.}

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