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 and maintenance of the force's operational effectiveness and defending the nation's territorial integrity and sovereignty.
The Indian Army, the land component of the Indian Armed Forces, follows a certain hierarchy of rank designations and insignia derived from the erstwhile British Indian Army (BIA).
Gorget patches are an insignia in the form of paired patches of cloth or metal on the collar of a uniform (gorget), used in the military and civil service in some countries. Collar tabs sign the military rank, the rank of civil service, the military unit, the office (department) or the branch of the armed forces and the arm of service.
Colonel is a rank in the Indian Army. Like other armies, this rank is higher than lieutenant colonel a It is equivalent to captain in the Indian Navy and group captain in the Indian Air Force.
Captain is a rank in the Indian Navy. Captain ranks above the rank of Commander and lower than a Commodore. It is equivalent to colonel in the Indian Army and group captain in the Indian Air Force.
The Cabinet Secretary is the top-most executive official and senior-most civil servant of the Government of India. The Cabinet Secretary is the ex-officio head of the Civil Services Board, the Cabinet Secretariat, the Indian Administrative Service (IAS), and all Civil Services of India work under the rules of business of the government.
Joint Secretary to the Government of India is a post under the Central Staffing Scheme and the third highest non-political executive rank in the Government of India. The authority for creation of this post solely rests with the Cabinet of India.
Secretary to the Government of India, often abbreviated as Secretary, GoI, or simply as Secretary, is a post and a rank under the Central Staffing Scheme of the Government of India. The authority for the creation of this post solely rests with the Union Council of Ministers.
The Chief of Defence Staff (CDS) is the principal military authority and senior-most appointment of the Indian Armed Forces. Deemed the overall professional head of India’s three armed services, namely, the Indian Army, the Indian Navy and the Indian Air Force, the CDS is the highest-ranking military officer in service, responsible for overseeing inter-service jointness across all disciplines related to military functioning. Primarily, the office operates on a status of primus inter pares i.e., first among equals with the chiefs of the three services, and functions as the Permanent-Chairman of the Chiefs of Staff Committee (COSC) – the inter-service syndicate responsible for ensuring the establishment and preservation of military integration.
General is a four-star general officer rank in the Indian Army. It is the highest active rank in the Indian Army. General ranks above the three-star rank of lieutenant general and below the five-star rank of field marshal, which is largely a war-time or ceremonial rank.
Admiral is a four-star naval flag officer rank in the Indian Navy. It is the highest active rank in the Indian Navy. Admiral ranks above the three-star rank of vice admiral and below the five-star rank of admiral of the fleet, which has never been awarded or held.
Air chief marshal is a four-star air officer rank in the Indian Air Force. It is the highest active rank in the Indian Air Force. Air chief marshal ranks above the three-star rank of air marshal and below the five-star rank of Marshal of the Indian Air Force, which is largely a war-time or ceremonial rank.
Air marshal is a three-star air officer rank in the Indian Air Force. It is the second-highest active rank in the Indian Air Force. Air marshal ranks above the two-star rank of air vice marshal and below the four-star rank of air chief marshal, which is held by the Chief of the Air Staff.
Vice admiral is a three-star flag officer rank in the Indian Navy. It is the second-highest active rank in the Indian Navy. Vice admiral ranks above the two-star rank of rear admiral and below the four-star rank of admiral, which is held by the Chief of the Naval Staff (CNS).
Lieutenant general is a three-star general officer rank in the Indian Army. It is the second-highest active rank in the Indian Army. Lieutenant generals rank above the two-star rank of Major General and below the four-star rank of General, which is held by the Chief of the Army Staff.
Rear admiral is a two-star flag officer rank in the Indian Navy. It is the third-highest active rank in the Indian Navy. Rear admiral ranks above the one-star rank of commodore and below the three-star rank of vice admiral.
Air vice marshal is a two-star air officer rank in the Indian Air Force. It is the third-highest active rank in the Indian Air Force. Air vice marshal ranks above the one-star rank of air commodore and below the three-star rank of air marshal.
Commodore is a one-star rank in the Indian Navy. Commodore ranks above the rank of captain and below the two-star rank of rear admiral. This navy rank will be abbreviated as CMDE or Cmde.
Brigadier is a one-star rank in the Indian Army. Brigadier ranks above the rank of Colonel and below the two-star rank of Major General.
Air Commodore is a One-star rank in the Indian Air Force. Air Commodore ranks above the rank of Group Captain and below the two-star rank of air vice marshal.
India 
Indian Army 
