The Unit Seasons 1-4 Complete Series DVD

In the U.S. Army, Delta Force is colloquially known as "The Unit". Its recruits are selected from the Army (primarily from the 75th Ranger Regiment and Special Forces groups). The few who pass selection then undergo several more years of sophisticated and rigorous training for counterterrorism, reconnaissance, and direct-action missions. In a television interview, series creator Eric Haney—who is a former Delta Force operator—stated that the term "Delta Force" is never used in the spec ops community. They are only referred to as "The Unit" and their DOD designation is "Combat Applications Group". The official cover name of the unit in the show is the "303rd Logistical Studies Group". In the third season's premiere, an onscreen read-out identifies the Unit as "1st Special Actions Group".The Unit is based at a fictional army post, "Fort Griffith". The location of Fort Griffith is never explicitly stated, but in episode 103, a bank statement of the lead character clearly shows an address for Fort Griffith, MO 63021, which puts it a few miles west of St. Louis.