By Col Vijayant Thakur (Retd) · Defence faculty, The Cavalier
India's armed forces are three services, a Coast Guard, a handful of joint commands and one civilian ministry that ties them together. Most aspirants meet this as a pile of separate facts: a rank here, a command headquarters there, a missile range somewhere else. This page gives you the whole picture first, and then sends you to the one page that answers each question.
Examiners set a few defence questions in every General Knowledge paper, and an SSB officer expects you to know how the service you want to join is built. The library below is written the way an officer would brief a cadet: short tables, dated facts and the traps examiners use.
The Armed Forces on One Screen
Read the chain from the top. Supreme command of the armed forces is vested in the President (Article 53(2) of the Constitution), to be exercised in accordance with law. In practice the elected government runs defence through the Ministry of Defence, and the Cabinet Committee on Security takes the big calls.
- President of IndiaSupreme Commander · Article 53(2)
- Ministry of DefenceRaksha Mantri · Defence Secretary · five departments
- Department of Military AffairsHeaded by the CDS as Secretary · HQ Integrated Defence Staff
- Indian ArmyGeneral · 7 commands
- Indian NavyAdmiral · 3 commands
- Indian Air ForceAir Chief Marshal · 7 commands
- Indian Coast GuardDirector General · armed force of the Union under the Coast Guard Act, 1978
- Tri-service commandsAndaman and Nicobar Command (2001) · Strategic Forces Command (2003)
- Ministry of DefenceRaksha Mantri · Defence Secretary · five departments
Three points in that diagram are where marks are lost.
- The Chief of Defence Staff is the head of the Department of Military Affairs and the Permanent Chairman of the Chiefs of Staff Committee. He is first among equals; he does not command the three Service Chiefs. Each chief still commands his own service and advises the Raksha Mantri directly.
- The Coast Guard is an armed force of the Union but sits under the Ministry of Defence, not the Navy. It was raised on 1 February 1977 as an interim force with ships lent by the Navy, and the Coast Guard Act followed in 1978.
- The 17 single-service commands are the Army's 7, the Navy's 3 and the Air Force's 7. The two tri-service commands are counted separately.
Counts of commands vary between study sources: some add the Andaman and Nicobar Command to the Navy's list, and some call it the only tri-service command although the Strategic Forces Command is tri-service too. Keep them apart: Navy = Western, Eastern, Southern; tri-service = Andaman and Nicobar (geographic) and Strategic Forces (functional).
Who's Who: The Top Appointments
These are the seven appointments that make news and make questions. The names and dates below are filled in from one maintained record, so they stay current when a post changes hands; the full list, with the commanders-in-chief, is on Who's Who.
| Appointment | Holder | Since | What the post does |
|---|---|---|---|
| President | Smt Droupadi Murmu | 25 July 2022 | Supreme Commander of the armed forces; appoints the Service Chiefs and the CDS; confers gallantry awards |
| Raksha Mantri | Shri Rajnath Singh | 11 June 2024 | Political head of the Ministry of Defence; chairs the Defence Acquisition Council that clears purchases |
| Chief of Defence Staff | Gen N S Raja Subramani | 31 May 2026 | Four-star General; Secretary of the Department of Military Affairs; Permanent Chairman of the Chiefs of Staff Committee; principal military adviser on tri-service matters |
| Chief of the Army Staff | Gen Dhiraj Seth | 30 June 2026 | Heads the Army, with the rank of General |
| Chief of the Naval Staff | Adm Krishna Swaminathan | 31 May 2026 | Heads the Navy, with the rank of Admiral |
| Chief of the Air Staff | ACM Ashutosh Dixit | 31 October 2026 | Heads the Air Force, with the rank of Air Chief Marshal |
| Director General, Coast Guard | DG Paramesh Sivamani | 15 October 2024 | Heads the Indian Coast Guard |
Learn the posts and their ranks once, and the names only for the week of your exam. The post never changes: Army chief is a General, Navy chief an Admiral, Air chief an Air Chief Marshal, and the CDS is a four-star General.
How the Chain Works in Practice
The CDS post is new. It was approved on 24 December 2019, the Department of Military Affairs was set up at the same time, and General Bipin Rawat, just retired as Army chief, took charge as the first CDS on 1 January 2020. The Kargil Review Committee had proposed such a post after the 1999 war, and the Integrated Defence Staff headquarters was created in 2001 as a first step.
The two tri-service commands show what jointness means on the ground. The Andaman and Nicobar Command, at Port Blair, has Army, Navy and Air Force units under one commander. The Strategic Forces Command was formed in January 2003, when the Cabinet Committee on Security constituted the Nuclear Command Authority, and looks after India's nuclear weapons.
The next step is the theatre command: merging the 17 single-service commands into a few integrated commands, each under one commander with all three services. Reports describe three or four. It is still a proposal: in late October 2026 the Defence Secretary said a blueprint was ready and approval at the highest level was awaited, so no theatre command exists yet.
- Jan 2025: INS Nilgiri (frigate), INS Surat (destroyer) and INS Vaghsheer (submarine) were commissioned together at Mumbai.
- 1 Oct 2026: HQ Integrated Defence Staff, set up on 1 October 2001, completed 25 years; press reports describe the day as Tri-Service Day and the Silver Jubilee. (PIB counts raising days from 2001, so it called the 2025 event the 25th Raising Day.) Our Silver Jubilee explainer traces the road from Kargil to the CDS.
- 31 May 2026: General Anil Chauhan completed his term as CDS and a new CDS took over; the current holder is in the table above.
For the background, read Operation Sindoor and the logic of deterrence and our piece on the Andaman and Nicobar Command.
A Guided Tour of the Library
Every page answers one question. The groups below follow the order most readers need.
The services
- Indian Army: origin, the 1895 and 1947 milestones, headquarters, motto, Army Day, and the chart that leads into commands, corps, regiments and weapons.
- Indian Navy: headquarters, motto, the 2022 ensign change, Navy Day, and fleets versus commands, with ships and submarines below.
- Indian Air Force: raised in 1932, the "Royal" prefix and its end, Vayu Bhawan, the first squadron, then commands, squadrons, air defence and Garud.
- Indian Coast Guard: the 1977 and 1978 dates, Ministry of Defence control, Coast Guard Day, and its roles in peace and war.
- Tri-Services: the higher defence organisation, from the Cabinet Committee on Security to the CDS, theatre commands and the two tri-service commands.
Flagship tables
- Ranks Equivalence: the Army, Navy, Air Force and Coast Guard ladders side by side, with CAPF and police ranks and the traps from past papers.
- Who's Who: every current appointment with its "since" date and source.
Missiles and weapons
- Missiles of India: the five missiles of the integrated programme, how missiles are classified, and a family tree by range and guidance.
- Nuclear Doctrine and the Triad: Pokhran in 1974 and 1998, the 2003 doctrine, the Nuclear Command Authority and the three legs of the triad.
Operations, exercises and history
- Wars and Operations: a timeline from 1947 to 2025 with codenames, the lead service and the outcome, with a page for each major war.
- Military Exercises: a country-by-service grid of exercises, what the names mean and how hosting rotates. The most-asked area in the NDA paper.
- Gallantry Awards: the wartime and peacetime series, order of precedence, "first recipient" facts and how the lists are announced.
- Military Firsts: first Indian Commander-in-Chief, first CDS, first woman fighter pilot and other "who was first" questions, by service.
Organisations, policy and the wider forces
- Defence Organisations: a map of the ecosystem, from DRDO and the defence PSUs to the 2021 ordnance factory corporatisation and the Border Roads Organisation.
- Defence Budget: the latest allocation, capital against revenue and pensions, the share of GDP and the trend.
- Defence Indigenisation and Exports: the Defence Acquisition Procedure, positive indigenisation lists, iDEX, defence corridors and exports.
- Defence Agreements: LEMOA, COMCASA, BECA, GSOMIA, the 2+2 dialogues and the Quad, one line each on what the pact allows.
- Agnipath Scheme: the 2022 scheme, its tenure, retention share and Agniveer benefits, stated as facts.
- Central Armed Police Forces: BSF, CRPF, CISF, ITBP, SSB, Assam Rifles and NSG, and where the Home and Defence ministries divide control.
- National Cadet Corps: the 1948 Act, wings, A, B and C certificates, the motto and the special entry link.
- Strategic Geography: why borders, island territories and sea chokepoints shape defence planning.
Reference
- Defence Days and Dates: service days, arms and corps days, Vijay Diwas, Kargil Vijay Diwas and Armed Forces Flag Day, and the origin of each.
- Mottos and War Cries: services, academies, regiments, CAPFs and the Coast Guard, with language and meaning.
- Training Academies: the pipeline from RIMC and the Sainik schools to the NDA, IMA, INA, Air Force Academy, OTAs, DSSC, CDM and NDC.
- Ceremonial Traditions: Beating Retreat, the Republic Day parade, the National War Memorial and the President's Colour.
- Defence Glossary: abbreviations from A to Z (GOC-in-C, AOC-in-C, CISC, DAC, DAP, IBG), each linked to its page.
- Defence GK Questions: real past-paper questions by service and topic, with verified answers and a link to the page that teaches each.
Start Here: A Reading Path for Your Exam
Do not read the library front to back. Each exam leans on a different part of it, and the past papers show where. In the 15 NDA GAT papers and 18 CDS General Knowledge papers we hold (2018 to 2026), a keyword count puts defence questions at roughly 2 to 4 a paper in both the NDA and the CDS.
| Exam | Read these first | Why, from the papers |
|---|---|---|
| NDA | Military Exercises, Indian Navy, Gallantry Awards, Missiles of India | Exercises are the biggest single group: Malabar, IMBEX, Dustlik, Desert Cyclone and others recur. Ships, gallantry awards and BrahMos fill most of the rest. |
| CDS / OTA | Tri-Services, Ranks Equivalence, Defence Agreements, Training Academies | Wider and more institutional: the CDS and Ministry of Defence, ranks, the 2+2 dialogue and the Defence Planning Committee, military institutes, plus ships, missiles and exercises. |
| AFCAT | Indian Air Force, Missiles of India, Military Exercises, Ranks Equivalence | The two AFCAT model papers we hold carry air-force questions on Garuda, Rafale, Igla, Barak and the Kargil operation, so the Air Force pages come first. |
| CAPF AC | Central Armed Police Forces, Ranks Equivalence, Wars and Operations | CAPF papers ask rank equivalence (Commodore, Wing Commander), the oldest central force (Assam Rifles) and operations. The CAPF page also separates Home Ministry forces from Defence Ministry ones. |
Keep the daily habit going: our defence current affairs is where a news event turns into next year's question, and the NDA, CDS and AFCAT past-paper pages test what you read. For AFCAT, the defence awareness notes sit beside this library. New articles can reach your inbox through the email newsletter.
The interview draws on the same material. Assessors ask you to explain the service you want to join, and the group discussion and lecturette often turn on theatre commands, Agnipath or self-reliance in defence. For careers, see the Army, Navy and Air Force pages and the pay scale guide. Our pages on women in defence forces and the Territorial Army cover two more routes.
If the NDA is your target, the Cavalier NDA course teaches this material alongside Maths and the GAT, then moves on to SSB training.
Exam pins
- Supreme command of the armed forces rests with the President, under Article 53(2). The Prime Minister, Raksha Mantri and CDS do not hold it.
- The CDS post was approved on 24 Dec 2019; the first CDS, Gen Bipin Rawat, took charge on 1 Jan 2020. The CDS is Secretary of the Department of Military Affairs, Permanent Chairman of the Chiefs of Staff Committee, and has no command over the Service Chiefs.
- 17 single-service commands: Army 7 (six operational plus ARTRAC for training), Navy 3, Air Force 7 (five operational, plus Training and Maintenance).
- Tri-service commands: Andaman and Nicobar Command (2001, Port Blair) and Strategic Forces Command (2003). Both are outside the 17.
- HQ Integrated Defence Staff was created in 2001 after the Kargil Review Committee; it completed 25 years on 1 Oct 2026 (the Silver Jubilee).
- Coast Guard: raised 1 Feb 1977, Act of 1978, under the Ministry of Defence.
- Service days: Army Day 15 Jan (Cariappa became the first Indian Commander-in-Chief in 1949), Navy Day 4 Dec (Operation Trident, 1971), Air Force Day 8 Oct (raised 1932).
- Assam Rifles is the only paramilitary force with dual control: administration under the Home Ministry, operations under the Army.
- The Defence Planning Committee, set up in April 2018, is chaired by the National Security Adviser.
- Five-star ranks are honorary and rare: Field Marshals Manekshaw and Cariappa, and Marshal of the Air Force Arjan Singh.
- Theatre commands are still a plan: no theatre command exists as of November 2026.
Asked in past papers
The hub-level facts are the ones the papers reuse. Here are five real questions on the structure itself.
Who is the Supreme Commander of the Indian Armed Forces?
(a) President (b) Prime Minister (c) Defence Minister (d) Longest serving Chief of Staff
Answer: (a). Article 53(2) vests supreme command in the President. The Raksha Mantri runs the Ministry, and no "longest serving chief" has any such role.
Consider the following statements about the position of the Chief of Defence Staff: 1. He is the Head of the Department of Military Affairs within the Ministry of Defence. 2. He is the Permanent Chairman of the Chiefs of Staff Committee. 3. He does not exercise any military command over the three Service Chiefs. Which of the statements given above is/are correct?
(a) 1 only (b) 2 and 3 only (c) 1 and 3 only (d) 1, 2 and 3
Answer: (d). All three hold. The tempting wrong choice is (a) or (c), by students who believe the CDS commands the chiefs. He does not; he is first among equals.
Which of the following is the only paramilitary force with a dual control structure?
(a) Central Reserve Police Force (b) Assam Rifles (c) Indo-Tibetan Border Police (d) Central Industrial Security Force
Answer: (b). Assam Rifles is administered by the Home Ministry but operationally controlled by the Army. The other three are under the Home Ministry alone.
With reference to India's defence, the terms 'Surat' and 'Udaygiri' refer to
(a) coast guard patrol boats (b) cargo helicopters (c) maritime patrol aircrafts (d) warships
Answer: (d). INS Surat is a destroyer and INS Udaygiri a frigate, both Navy ships. The Coast Guard option is a distractor because the Coast Guard does run patrol vessels, but these two belong to the Navy.
Which one among the following Joint Military Exercises was NOT conducted between India and USA?
(a) Yudhabhyas (b) Vajra Prahar (c) Malabar (d) Varuna
Answer: (d). Varuna is the India-France naval exercise. Yudhabhyas (Army) and Vajra Prahar (special forces) are India-US exercises, and Malabar includes the US.
Structure questions (who commands whom, what a post can and cannot do) turn on one word, like "command". List questions (ranks, exercises, ships) hide one swapped item. Learn the pairs and the order, not just the names.
Practice MCQs (with answers)
- Supreme command of the armed forces is vested in the President under which Article of the Constitution?
- Article 52
- Article 53
- Article 74
- Article 75
- The Indian Coast Guard functions under which Ministry?
- Ministry of Defence
- Ministry of Home Affairs
- Ministry of Ports, Shipping and Waterways
- Ministry of Earth Sciences
- How many single-service commands do the Army, Navy and Air Force have together?
- 14
- 15
- 17
- 19
- Which tri-service command was set up in 2001 with its headquarters at Port Blair?
- Strategic Forces Command
- Southern Command
- Training Command
- Andaman and Nicobar Command
- The Chief of Defence Staff heads which Department of the Ministry of Defence?
- Department of Defence
- Department of Military Affairs
- Department of Defence Production
- Department of Ex-Servicemen Welfare
- Navy Day on 4 December commemorates
- Operation Trident in the 1971 war
- the first commissioning of INS Vikrant
- the Royal Indian Navy mutiny
- the signing of the Coast Guard Act
1-b, 2-a, 3-c, 4-d, 5-b, 6-a. Q1: Article 53(2); Article 52 only creates the office of President. Q3: 7 + 3 + 7 = 17, and the two tri-service commands are extra. Q4: the Strategic Forces Command is also tri-service, but it was formed in 2003 and is not tied to Port Blair. Q6: Navy Day marks the Navy's missile-boat strike on Karachi harbour on 4 December 1971.
Pages in this section
Frequently asked questions
Who is the Supreme Commander of the Indian armed forces?
The President of India is the Supreme Commander. Article 53(2) of the Constitution vests supreme command of the armed forces in the President, to be exercised in accordance with law. In practice the government, through the Ministry of Defence and the Cabinet Committee on Security, takes the decisions.
What is the difference between the CDS and the Service Chiefs?
The Chief of Defence Staff is a four-star General who heads the Department of Military Affairs and is the Permanent Chairman of the Chiefs of Staff Committee. The CDS does not command the Army, Navy or Air Force chiefs; each chief still commands his own service. The CDS works on jointness and advises the Raksha Mantri on tri-service matters.
How many commands does the Indian military have?
There are 17 single-service commands: seven in the Army, three in the Navy and seven in the Air Force. Besides these, two commands are tri-service, the Andaman and Nicobar Command (2001) and the Strategic Forces Command (2003). Theatre commands are proposed but not yet approved.
Is the Coast Guard part of the Navy?
No. The Indian Coast Guard is a separate armed force of the Union, constituted under the Coast Guard Act, 1978, and it works under the Ministry of Defence. It began on 1 February 1977 as an interim force using ships transferred from the Navy.
Which Defence GK pages should I read first for an exam?
For the NDA, start with military exercises, the Navy, gallantry awards and missiles. For the CDS, start with the tri-services page, ranks equivalence and defence agreements. AFCAT aspirants should begin with the Air Force pages, and CAPF aspirants with the central armed police forces and ranks equivalence.
Sources: ids.nic.in · mod.gov.in · indiancoastguard.gov.in/history · pib.gov.in/Pressreleaseshare.aspx?PRID=1895054
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