Reactivated in August 1946 as part of Eleventh Air Force (Later Alaskan Air Command) as part of the air defense forces in the northwest Pacific.
Squadron began training new P-51 pilots at Elmendorf Field, Alaska.
Later, it was equipped with F-80Bs in March–April 1948, F-80Cs in October–December 1948, F-94Bs in the summer of 1951, and F-89Cs in September 1953.
With these aircraft, the squadron provided fighter aircraft defense in support of the Alaska Area until late in the 1950s.

Was reassigned to Oxnard AFB, California in 1957, but was never equipped or manned due to budgetary constraints, inactivated by Air Defense command, January 1958.

Reactivated by Tactical Air Command at Nellis AFB, Nevada in October 1969 Assumed the F-105C/D Thunderchief assets of the provisional 4537th Fighter Weapons Squadron, tail coded "WC".
 Mission was to perform "Wild Weasel" training for USAF pilots and electronic warfare officers to be deployed to combat missions in  Southeast Asia.
 Squadron aircraft carried tail code "WA" by October 1971, black/yellow checkered tail stripes.
 Squadron also assumed F-4C Phantom II assets, tail coded "WD" until October 1971, then changed to same "WA" as the F-105s.
 Trained with the F-4s and F-105s until July 1975 when Wild Weasel training and aircraft reassigned to George AFB, California.

Remained in non-operational status until October 1977 when reorganized as an A-10 Squadron, tail coded "WA", black/yellow checkered tail stripes.
 Performed fighter weapons training with the A-10 until the end of 1981, when inactivated and squadron was reassigned to the USAF Fighter Weapons School, being re-designated as "A-10 Division".
Reactivated in August 1946 as part of Eleventh Air Force (Later Alaskan Air Command) as part of the air defense forces in the northwest Pacific. Squadron began training new P-51 pilots at Elmendorf Field, Alaska. Later, it was equipped with F-80Bs in March–April 1948, F-80Cs in October–December 1948, F-94Bs in the summer of 1951, and F-89Cs in September 1953. With these aircraft, the squadron provided fighter aircraft defense in support of the Alaska Area until late in the 1950s.
Was reassigned to Oxnard AFB, California in 1957, but was never equipped or manned due to budgetary constraints, inactivated by Air Defense command, January 1958.
Reactivated by Tactical Air Command at Nellis AFB, Nevada in October 1969 Assumed the F-105C/D Thunderchief assets of the provisional 4537th Fighter Weapons Squadron, tail coded "WC".  Mission was to perform "Wild Weasel" training for USAF pilots and electronic warfare officers to be deployed to combat missions in  Southeast Asia.  Squadron aircraft carried tail code "WA" by October 1971, black/yellow checkered tail stripes.  Squadron also assumed F-4C Phantom II assets, tail coded "WD" until October 1971, then changed to same "WA" as the F-105s.  Trained with the F-4s and F-105s until July 1975 when Wild Weasel training and aircraft reassigned to George AFB, California.
Remained in non-operational status until October 1977 when reorganized as an A-10 Squadron, tail coded "WA", black/yellow checkered tail stripes.  Performed fighter weapons training with the A-10 until the end of 1981, when inactivated and squadron was reassigned to the USAF Fighter Weapons School, being re-designated as "A-10 Division".
66th Weapons Squadron