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  • 4 Operational Medical Readiness Squadron (ACC)

    Lineage.  Constituted as 4 Aerospace Medicine Squadron on 26 Aug 1994.  Activated on 1 Sep 1994.  Redesignated as: 4 Aeromedical-Dental Squadron on 15 Dec 1997; 4 Aerospace Medicine Squadron on 11 May 2008; 4 Operational Medical Readiness Squadron on 1 Aug 2019.Assignments.  4 Medical Group, 1 Sep

  • 4 Operations Group (ACC)

    Lineage.    Established as 4 Fighter Group on 22 Aug 1942.  Activated on 12 Sep 1942.  Inactivated on 10 Nov 1945.  Activated on 9 Sep 1946.  Redesignated as: 4 Fighter-Interceptor Group on 20 Jan 1950; 4 Fighter-Bomber Group on 8 Mar 1955; 4 Fighter-Day Group on 25 Apr 1956.  Inactivated on 8 Dec

  • 4 OPERATIONS SUPPORT SQUADRON (ACC)

    Lineage.  Constituted 4 Operations Squadron on 9 Dec 1958.  Activated on 25 Jan 1959.  Discontinued, and inactivated, on 1 Oct 1962.  Redesignated 4 Operations Support Squadron on 17 Apr 1991.  Activated on 22 Apr 1991. Assignments.  4 Air Base Group, 25 Jan 1959-1 Oct 1962.  4 Operations Group, 22

  • 4 Reconnaissance Squadron (ACC)

    Lineage.  Constituted as 4 Observation Squadron on 22 Nov 1940.  Activated on 1 Apr 1941.  Redesignated as:  4 Observation Squadron (Medium) on 26 Feb 1942; 4 Observation Squadron on 4 Jul 1942; 4 Reconnaissance Squadron (Special) on 25 Jun 1943; 4 Tactical Reconnaissance Squadron on 20 May 1944; 4

  • 4 Security Forces Squadron (ACC)

    Lineage. Designated as Squadron B, 4 Airdrome Group, on 28 Jul 1947. Organized on 15 Aug 1947. Discontinued on 1 Aug 1948. Consolidated (12 Oct 1984) with the 4 Air Police Squadron, Fighter, Jet, which was constituted on 14 Jun 1948. Activated on 1 Aug 1948. Redesignated as: 4 Air Police Squadron on

  • 4 Space Control Squadron (AFSPC)

    Lineage. Constituted as 4 Surveillance Squadron on 26 Sep 1990. Activated on 1 Oct 1990. Redesignated as: 4 Space Surveillance Squadron on 15 May 1992; 4 Space Control Squadron, 1 Mar 2003.Assignments. 73 Space Surveillance (later, 73 Space) Group, 1 Oct 1990; 21 Operations Group, 26 Apr

  • 4 Space Launch Squadron (AFSPC)

    Lineage. Constituted 4 Space Launch Squadron on 29 Mar 1994. Activated on 15 Apr 1994. Inactivated on 29 Jun 1998. Activated on 1 Dec 2003. Assignments. 30 Operations Group, 15 Apr 1994-29 Jun 1998. 30 Launch Group, 1 Dec 2003-. Stations. Vandenberg AFB, CA, 15 Apr 1994-29 Jun 1998. Vandenberg AFB,

  • 4 Space Operations Squadron (SpOC)

    Lineage. Constituted as 4 Photographic Squadron on 15 May 1941. Activated on 10 Jun 1941. Redesignated: 4 Mapping Squadron on 13 Jan 1942; 4 Photographic Mapping Squadron on 9 Jun 1942; 4 Photographic Charting Squadron on 11 Aug 1943; 4 Reconnaissance Squadron, Long Range, Photographic, on 15 Jun

  • 4 Space Warning Squadron (AFRC)

    Lineage.  Constituted as 4 Space Communications Squadron on 1 May 1992.  Activated on 15 May 1992.  Redesignated as 4 Space Warning Squadron on 1 Oct 1992.  Inactivated on 1 Mar 1996.  Activated on 3 Aug 2019.Assignments.  21 Operations Group, 15 May 1992–1 Mar 1996.  710 Operations Group, 3 Aug

  • 4 Special Operations Squadron (AFSOC)

    Lineage: 4 Ferrying Squadron (constituted 4 Air Corps Ferrying Squadron on 18 Feb 1942; activated on 8 Apr 1942; redesignated as 4 Ferrying Squadron on 12 May 1943; disbanded on 31 Mar 1944; reconstituted on 19 Sep 1985) consolidated (19 Sep 1985) with the following units: 4 Liaison Squadron