The Armed Forces Academies Preparatory School or AFAPS is a senior high school in Nakhon Nayok Province. It is a flagship institution of the Royal Thai Armed Forces Headquarters. The curriculum consists of academic and physical training as well as other activities. Cadets who manage to graduate automatically gain entrance to the Chulachomklao Royal Military Academy, the Royal Thai Naval Academy, the Royal Thai Air Force Academy, or the Royal Thai Police Academy.

The Royal Thai Armed Forces Headquarters or the RTARF HQ, is the "mostly ornamental" joint headquarters of the Royal Thai Armed Forces, which is composed of the Royal Thai Army, the Royal Thai Navy and Royal Thai Marine Corps, and the Royal Thai Air Force. Formerly the Supreme Command Headquarters, the name was changed in February 2008. The headquarters is divided into two branches: the "Command Group" and the "Joint Group".