The 7th Special Operations Squadron (SOS) was activated on 1 July 1964 as the 7th Air Commando Squadron (7 ACS/USAFE) at Sembach Air Base, West Germany. The original cadre came from Hurlburt Field, Florida, in March 1964, as Detachment 4, 1st Air Commando Wing. The new squadron was equipped with 4 C-123s, 6 C-47s and 2 U-10 aircraft, and had 265 personnel authorized. In February 1967, the 7 ACS was designated as the unit to receive the new C-130E(I) Combat Arrow aircraft. In May 1967, command of the squadron was transferred from USAFE to 17th Air Force.