Delta Force Delta Force The 1st Special Forces Operational Detachment-Delta (1st SFOD-D), commonly referred to as Delta Force, Combat Applications Group (CAG), "The Unit", Army Compartmented Element (ACE), or within JSOC as Task Force Green, is an elite special mission unit of the United States Army, under operational control of the Joint Special Operations Command. The unit is tasked with specialized missions primarily involving hostage rescue and counter-terrorism, as well as direct action and special reconnaissance against high-value targets. Delta Force and its maritime counterpart, the U.S. Navy's SEAL Team Six (also known as "DEVGRU"), are the U.S. military's primary counterterrorism units.
Counter-intelligence and counter-terrorism organizations for terrorism law enforcement is the FBI, although a number of units of the Department of Homeland Security may provide support After the Oklahoma City bombing of 19 April 1995, by Timothy McVeigh, an American, the CI definition reasonably extends to include domestically-originated terrorism. There is also the challenge of what organizations, laws, and doctrines are relevant to protection against all sorts of terrorism in one's own country. See Counter-intelligence Force Protection Source Operations for a discussion of special considerations of protection of government personnel and facilities, both in the US and internationally. Immigration services, which had been under the