Other
- 39th Special Forces Detachment (1952-1984), in Berlin, Germany, a classified unit that conducted unconventional warfare during the cold war
- 6th Special Forces Group (1963–1971), 8th Special Forces Group (1963–1972), 11th Special Forces Group (1961–1994) and 12th Special Forces Group (1961–1994) (disbanded Army Special Forces Groups)
- "Blue light", a counter-terrorist unit created among the 5th Special Forces Group in the late 1970s
- Task Force Bayonet, a Joint Task Force specialised in Foreign Internal Defense (FID) duties for Latin American countries; mainly composed of Special Forces, but also included United States Navy SEALs, Delta Force and Intelligence Support Activity operators
- US Army Special Operations Division
- SEASPRAY, an aviation unit for military covert operations during the 1980s
- Red Cell, U.S. "Tiger team" active in the 1980s
- Task Force Ranger (Operation Gothic Serpent), joint Army/Navy task force deployed to Somalia between August and October 1993
- Task Force 11 (Operation Enduring Freedom), joint Army/Navy task force created to capture or kill senior al-Qaeda and Taliban leaders in Afghanistan
- Task Force 20, Task Force 121 (Operation Iraqi Freedom), multinational joint task forces created to capture or kill senior leadership of the former Baathist regime in Iraq, including Saddam Hussein; also tasked with capturing or killing the leadership of the Iraqi insurgency as well as senior al-Qaeda operatives in Iraq; Task Force 20 later merged with Task Force 121, and is now believed to be active under the designation Task Force 77.
- Marine Corps Special Operations Command Detachment One (MCSOCOM-Det 1) (Operation Iraqi Freedom), pilot project active from 19 June 2003 to 10 March 2006 to assess the establishment of a permanent U.S. Marine Corps unit under Special Operations Command (SOCOM); replaced by the United States Marine Corps Forces Special Operations Command (MARSOC)
- Observer Group
- Marine Corps Test Unit#1
Read more about this topic: List Of Former United States Special Operations Units