The Chief of Army Staff (COAS) or Chief of Staff of the Army is a title commonly used for the appointment held by the most senior officer in several nations' armies.
Notable country-specific uses of this title are:
Chief of Army (Australia)
Chief of Army (Sweden)
Chief of Army Staff of the Bangladesh Army (COAS)
Chief of the Army Staff of the Canadian Army
Chief of Staff of the French Army (French: Chef d'État-Major de l'Armée de Terre, CEMAT)
Chief of the Army Staff (India) (COAS)
Chief of Army (New Zealand Army), see New Zealand Defence Force current senior officers
Chief of Army Staff (Pakistan) (COAS)
Chief of the General Staff (United Kingdom) (CGS)
Chief of Staff of the United States Army (CSA)
Chief of Army Staff (Nigeria) (COAS)
