High Quality Content by WIKIPEDIA articles! The 1st Special Forces Operational Detachment-Delta (1st SFOD-D) commonly known as Delta, Delta Force or the Combat Applications Group (CAG) by the United States Department of Defense, is an elite Special Operations Force (SOF) and an integral element of the Joint Special Operations Command (JSOC). It is the United States' primary counter-terrorist unit. Delta Force's primary tasks are counter-terrorism, counter-insurgency and national intervention operations, although it is an extremely versatile group capable of assuming many covert missions, including, but not limited to, rescuing hostages and raids.