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  • 20 Medical Group (ACC)

    Lineage. Constituted as 20 Station Medical Group on 15 Jun 1948. Activated on 24 Aug 1948. Redesignated as: 20 Medical Group on 1 Apr 1949; 20 Tactical Hospital on 8 Mar 1954. Inactivated on 1 Jul 1986. Redesignated as 20 Medical Group on 1 Mar 1992. Activated on 31 Mar 1992. Inactivated on 1 Jan

  • 20 Mission Support Group (ACC)

    Lineage.  Established as 20 Airdrome Group on 28 Jul 1947.  Organized on 15 Aug 1947.  Discontinued on 26 Aug 1948.  Consolidated (1 Oct 1984) with the 20 Air Base Group, which was established on 15 Jun 1948.  Activated on 24 Aug 1948.  Redesignated as: 20 Support Group on 26 Jan 1956; 20 Combat

  • 20 Operational Medical Readiness Squadron (ACC)

    Lineage.  Constituted as 20 Aerospace Medicine Squadron on 26 Aug 1994.  Activated on 1 Sep 1994.  Redesignated: 20 Aeromedical-Dental Squadron on 1 Aug 1997; 20 Aerospace Medicine Squadron on 15 Aug 2007; 20 Operational Medical Readiness Squadron on 1 Aug 2019.Assignments.  20 Medical Group, 1 Sep

  • 20 Operations Group (ACC)

    Lineage.   Authorized as 20 Balloon Group on 18 Oct 1927.  Redesignated as 20 Pursuit Group on 30 Jun 1929.  Activated on 15 Nov 1930.  Redesignated as: 20 Pursuit Group (Fighter) on 6 Dec 1939; 20 Pursuit Group (Interceptor) on 12 Mar 1941; 20 Fighter Group on 15 May 1942; 20 Fighter Group (Twin

  • 20 Reconnaissance Squadron (ACC)

    Lineage. Constituted as 20 Transport Squadron on 22 Nov 1940. Activated on 15 Dec 1940. Redesignated as: 20 Troop Carrier Squadron on 5 Jul 1942; 20 Troop Carrier Squadron (Special) on 13 Nov 1943; 20 Troop Carrier Squadron on 12 Apr 1944; 20 Troop Carrier Squadron, Heavy, on 17 Jun 1948; 20 Troop

  • 20 Security Forces Squadron (ACC)

    Lineage. Designated as Squadron "B", 20 Airdrome Group on 28 Jul 1947. Activated on 15 Aug 1947. Discontinued on 26 Aug 1948. Consolidated (12 Oct 1984) with the 20 Air Police Squadron, Fighter, Jet, which was constituted on 15 Jun 1948. Activated on 24 Aug 1948. Redesignated as: 20 Air Police

  • 20 Space Surveillance Squadron (SpOC)

    Lineage.  Constituted as 20 Surveillance Squadron, and activated, on 9 Nov 1966.  Organized on 1 Jan 1967.  Redesignated as: 20 Missile Warning Squadron on 1 Jul 1979; 20 Surveillance Squadron on 31 May 1987; 20 Space Surveillance Squadron on 15 May 1992; 20 Space Control Squadron on 1 Mar 2003. 

  • 20 Special Operations Squadron (AFSOC)

    Lineage.   Constituted as 20 Observation Squadron (Light) on 5 Feb 1942.  Activated on 2 Mar 1942.  Redesignated as: 20 Observation Squadron on 4 Jul 1942; 20 Reconnaissance Squadron (Fighter) on 2 Apr 1943; 20 Tactical Reconnaissance Squadron on 11 Aug 1943.  Inactivated on 27 Nov 1945. 

  • 21 Airlift Squadron (AMC)

    Lineage. Constituted as 21 Transport Squadron on 7 Mar 1942. Activated on 3 Apr 1942. Redesignated as 21 Troop Carrier Squadron on 5 Jul 1942. Inactivated on 31 Jan 1946. Activated on 15 Oct 1946. Redesignated as: 21 Troop Carrier Squadron, Heavy, on 21 May 1948; 21 Troop Carrier Squadron, Medium,

  • 21 Communications Squadron (SpOC)

    Lineage.  Constituted as 21 Communications Squadron on 15 Nov 1952.  Activated on 1 Jan 1953.  Inactivated on 8 Feb 1958.  Consolidated (1 May 1992) with the 2163 Communications Squadron, which was designated and activated on 1 Oct 1979.  Redesignated as: 2163 Information Systems Squadron on 1 Jul