Background:
The U.S. Army's 1st Special Forces Operational Detachment-Delta (SFOD-D) is one of the nation's principle units tasked with counter-terrorist, close quarter combat and hostage rescue operations outside the United States. It is organized into three operating squadrons, all of which (A, B, and C) are subdivided into small groups known as troops. Each troop specializes in HALO, SCUBA, or other skill groups. SFOD-D's existence has never officially been acknowledged by the U.S. government.

SFOD-D is headquartered in a remote section of the U.S. Army's Fort Bragg in North Carolina. In addition to rigorous physical and intellectual tests, the successful Delta candidate must pass a lengthy psychological review. The vast majority of the unit operatives come from the United States' Ranger battalions and Special Forces groups, however candidates are drawn from all branches of the Army, including the Army Reserve and National Guard.