1st Special Forces Operational Detachment-Delta (1st SFOD-D), popularly known as Delta Force, is a U.S. Army component of Joint Special Operations Command. It was formerly listed as the Combat Applications Group (CAG) by the Department of Defense. While 1st SFOD-D is administratively supported by USASOC, it falls under the operational control of the Joint Special Operations Command. Delta Force and its Navy counterpart, the Naval Special Warfare Development Group, are the United States military's primary counter-terrorism units. It is often referred to in the U.S.