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A special mission unit (SMU), at one time referred to as a "tier 1" unit, [1] is a designation for the United States military's most highly secretive and elite special operations forces. [2] The term special missions unit is also used in Australia to describe the Special Air Service Regiment.
Delta Force, along with the Intelligence Support Activity, and its Navy and Air Force counterparts, DEVGRU (SEAL Team 6) and the 24th Special Tactics Squadron, are the U.S. military's tier one special mission units that are tasked with performing the most complex, covert, and dangerous missions directed by the President of the United States and ...
The United States Army Special Forces (SF), colloquially known as the "Green Berets" due to their distinctive service headgear, is the special operations branch of the United States Army. [ 9 ] The core missionset of Special Forces contains five doctrinal missions: unconventional warfare , foreign internal defense , direct action ...
United States Army. 1st Special Forces Operational Detachment-Delta (1st SFOD-D or "Delta Force") Intelligence Support Activity (ISA) Aviation Technology Office (ATO) (formerly "Flight Concepts Division") [273] United States Navy. Naval Special Warfare Development Group (DEVGRU or "SEAL Team Six") United States Air Force. 24th Special Tactics ...
From about 2004 to 2011, [4] [5] U.S. military planners used various "Tier systems" to designate the various elements in an overall plan for integrated operations. [6] The Tiers do not refer to specific models of aircraft, but rather roles the aircraft would fill. The U.S. Air Force, U.S. Marine Corps, and U.S. Army each have their own tier system.
As the Air Force's Tier 1 unit, the 24th STS provides special operations airmen to the Joint Special Operations Command, including Pararescuemen, Combat Controllers, Special Reconnaissance, and Tactical Air Control Party personnel. 24th STS members are also trained to conduct classified and clandestine operations such as direct action, counter-terrorism, counter-insurgency, hostage rescue, and ...
United States special operations forces (SOF) are the active and reserve component forces of the United States Army, Marine Corps, Navy and Air Force within the US military, as designated by the Secretary of Defense and specifically organized, trained, and equipped to conduct and support special operations.
The OSS was disbanded shortly after World War II, with its intelligence analysis functions moving temporarily into the United States Department of State. Espionage and counterintelligence went into military units, while paramilitary and other covert action functions went into the Office of Policy Coordination set up in 1948.