The 4th Special Operations Squadron (4 SOS) is part of the 1st Special Operations Wing at Hurlburt Field, Florida. It operates AC-130U Spooky aircraft providing special operations capability.
Directly supports unified and theater special operations commands by conducting close air support, armed reconnaissance, and interdiction missions worldwide in support of Secretary of Defense taskings.
The 4th ferried aircraft to locations in Alaska, Africa, and Europe from, April 1942–February 1944. It also airlifted cargo and evacuated wounded to US military hospitals.
The 4th flew combat missions in Vietnam from, c. 20 November 1965–30 November 1969.
It provided an auxiliary command post and a communications link for the Fifteenth Air Force and Strategic Air Command from, 1 April 1970–30 September 1992.
In September 1996, the squadron deployed to Brindisi, Italy, supporting Operation Joint Endeavor in the skies over Bosnia and Herzegovina. The squadron saw its first combat operations since the Vietnam War in April 1999 over Kosovo while supporting Operation Allied Force. In the fall of 2001, the 4th was called upon, to fight the War on Terrorism by striking Taliban and Al-Qaeda targets in Afghanistan. In the spring of 2003, the 4th participated in the invasion of Iraq. During the initial 2 months of the conflict the 4th flew more than 1000 combat hours from 3 separate forward operating locations.
- 4th Air Corps Ferrying Squadron (1942 - 1943)
- 4th Ferrying Squadron (1943 - 1949)
- 4th Liaison Flight (1949 - 1952)
- 4th Liaison Squadron (1952 - 1965)
- 4th Air Commando Squadron (Fire Support) (1965 - 1968)
- 4th Special Operations Squadron (1968 - 1970)
- 4th Airborne Command and Control Squadron (1970 - 1995)
- 4th Special Operations Squadron (1995 - Present)