between 1951 and 1993. The most senior rank at Army Foundation College (AFC Harrogate) is the rank of Lieutenant Colonel. As he's the most senior officer in charge, he's the Commandant of the entire college. In the Army Cadet Force, a Colonel is customarily the most senior commissioned officer in charge of an ACF County (of which contains four companies). This rank is thus known as the Commandant and their second-in-command (2IC) is the Deputy Commandant, who has the rank of Lieutenant Colonel. Similarly, the commissioned officer in charge of a detachment (e.g. platoon, troop, aka. "unit") is that detachment's Commanding Officer (CO), and/whereas the officer commanding a company is the Officer-Commanding (OC) In the Royal Air Force Air Cadets, the officer in charge of the organisation is given the title Commandant Air Cadets and will hold the position for two years. Formerly, commandant was the usual title for the head of the Special Constabulary within a police force. In some forces the title was Chief Commandant, with subordinate divisional or sub-divisional commandants. The standard title for this position is now "chief officer". United States In the United States, "commandant" is an appointment, not a rank, and the following three appointments currently exist: Commandant of the Marine Corps Commandant of the Coast Guard Commandant of the Operations (Ships) Formerly, admirals were appointed as commandants of naval districts. The commandant is the second most senior officer (after the superintendent) of United States Service academies, such as West Point, United States Naval Academy, and the United States Air Force Academy, equivalent to the Dean of Students at a civilian college. Commandant is also the title of the commanding officer of many units of the United States Army Training and Doctrine Command, including the non-commissioned officer academies, whose commandants are typically command sergeants major. Commandant is also the title of the ranking officer in charge of each War college of the United States military, and is responsible for the administration, academic progress and success of the civilians and military officers assigned to the college. The commandant is a model for all personnel, a military academy graduate of impeccable character and bearing who has demonstrated accomplishment in both academic excellence and active military service in the field. They include the Naval War College, the USAF Air War College, the Army War College, the Marine Corps War College and the National War College. Commandant is