The Chief of the Army Staff (COAS) is a statutory office held by the professional head of the Indian Army (IA), the land forces branch of the Indian Armed Forces. Customarily held by a four-star general officer, the COAS is the senior-most operational officer of the IA, tasked with the roles of overseeing the overall functioning of the force during peace and wartime, committing to the preparation-cum-maintenance of the force's operational effectiveness and defending the nation's territorial integrity-cum-sovereignty. Also a permanent member of the Chiefs of Staff Committee (COSC) and the National Security Council (NSC), the COAS also bears the responsibility of advising the nation's civilian leadership i.e., the Government of India on all matters privy to the IA.

The Indian Armed Forces are the military forces of the Republic of India. It consists of three professional uniformed services: the Indian Army, Indian Navy, and Indian Air Force. Additionally, the Indian Armed Forces are supported by the Central Armed Police Forces, Indian Coast Guard and Special Frontier Force and various inter-service commands and institutions such as the Strategic Forces Command, the Andaman and Nicobar Command and the Integrated Defence Staff. The President of India is the Supreme Commander of the Indian Armed Forces but the executive authority and responsibility for national security is vested in the Prime Minister of India and their chosen Cabinet Ministers. The Indian Armed Forces are under the management of the Ministry of Defence of the Government of India. With strength of over 1.4 million active personnel, it is the world's second-largest military force and has the world's largest volunteer army. It also has the third-largest defence budget in the world. The Global Firepower Index report lists it as the fourth most-powerful military.