A detachment is a military unit. It can either be detached from a larger unit for a specific function or (particularly in United States Army usage) be a permanent unit smaller than a battalion. The term is often used to refer to a unit that is assigned to a base different from the parent unit. An example is the United States Army's 1st Special Forces Operational Detachment-Delta (Airborne) (1st SFOD-D (A)), commonly known as Delta Force by the general public. A military unit is an organisation within an armed force. ... US Army Seal HHC, US Army Distinctive Unit Insignia The Army is the branch of the United States armed forces that has primary responsibility for land-based military operations. ... Symbol of the Austrian 14th Armoured Battalion in NATO code In military terminology, a battalion consists of two to six companies typically commanded by a lieutenant colonel. ... Official Names 1st Special Forces Operational Detachment-Delta (Airborne) 1st SFOD-D (A) Combat Application Group (CAG) Nicknames Delta Force D-boys Delta boys Deltas Delta Operators Branch U.S. Army Chain of Command USASOC Department of Defense Description Versatile Special Operations Force, mainly trained for counter-terrorism. ...