The three services and tri-service structures, the major joint exercises by partner, the defence research and production organisations and key missiles, and the full CAPF and internal-security circuit for CAPF Paper I
Defence and internal security carry extra weight in CAPF Paper I and in the interview, and most of the content is durable: the three services and their joint structures, which exercise pairs India with which partner, the defence research and production organisations, the major missile families, and the full circuit of Central Armed Police Forces and intelligence agencies. Names and structures are static; the latest exercise edition, the newest induction, and the current chiefs are dated and must be verified. This note is the durable compendium; the sibling defence and internal security in news covers the same exercise spine, and the five forces details the five forces a candidate may join. Sources: the Ministry of Defence, the Ministry of Home Affairs, PIB, and the force websites.
| Body | Role |
|---|---|
| Indian Army, Navy, Air Force | The three services; each headed by a Chief of Staff |
| Chief of Defence Staff (CDS) | Post created in 2019; heads the Department of Military Affairs; single-point military adviser to the Government |
| Integrated Defence Staff (IDS) | Supports the CDS and the Chiefs of Staff Committee |
| Ministry of Defence | Civilian control; the Defence Minister and the Department of Defence |
| Defence Acquisition Council (DAC) | Apex body for capital acquisitions; chaired by the Defence Minister |
| Command | Role |
|---|---|
| Andaman and Nicobar Command (ANC) | India's first tri-service and only geographical joint command; based at Port Blair |
| Strategic Forces Command (SFC) | Manages the nuclear arsenal and its delivery |
India is moving towards integrated theatre commands; treat the roll-out as a "verify the latest" item.
The high-frequency question is "which exercise pairs India with which partner". Learn the pairing; the edition number is dated.
| Exercise | Partner | Domain |
|---|---|---|
| Malabar | US, Japan, Australia (QUAD navies) | Naval |
| Yudh Abhyas | United States | Army |
| Vajra Prahar | United States | Special forces |
| Cope India | United States | Air Force |
| Indra | Russia | Joint / tri-service |
| Varuna | France | Naval |
| Garuda | France | Air Force |
| Shakti | France | Army |
| SIMBEX | Singapore | Naval |
| Surya Kiran | Nepal | Army |
| Mitra Shakti | Sri Lanka | Army |
| Sampriti | Bangladesh | Army |
| Hand-in-Hand | China | Army (counter-terror) |
| Al Nagah | Oman | Army |
| Milan | Multinational (Indian Navy host) | Naval |
Memory aids: France clusters as Varuna (naval), Garuda (air), Shakti (army); the United States pairs with Yudh Abhyas, Vajra Prahar and Cope India; Malabar is the QUAD naval exercise. For the full table see defence and internal security in news.
| Organisation | Role |
|---|---|
| DRDO | Defence research and development; missiles, radars, systems |
| HAL | Military aircraft (for example the Tejas Light Combat Aircraft) |
| BEL, BDL, BEML | Defence electronics, missiles, earth-moving |
| DPSUs and the corporatised ordnance companies | Equipment and ammunition |
| Missile | Type |
|---|---|
| Agni series | Long-range ballistic (strategic; Agni-V is intercontinental class) |
| Prithvi | Short-range ballistic |
| BrahMos | Supersonic cruise (India-Russia joint venture) |
| Akash | Surface-to-air |
| Nag / Helina | Anti-tank guided |
| Astra | Beyond-visual-range air-to-air |
| K-series (K-15, K-4) | Submarine-launched (nuclear triad's sea leg) |
India's nuclear triad (land, air and sea-based delivery) and its declared "No First Use" posture are recurring static points.
This is the dimension CAPF tests that generic GK ignores. Public order and police are State subjects (State List Entries 1 and 2), but the Union holds the armed and paramilitary forces and bears the duty to protect the States (Article 355), which is why Central forces are deployed within States in aid of the civil power.
| Force | Primary mandate |
|---|---|
| BSF (Border Security Force) | Guards the India-Pakistan and India-Bangladesh borders; the first line of defence in peace |
| CRPF (Central Reserve Police Force) | The largest CAPF; internal security, anti-Naxal operations, riot control |
| CISF (Central Industrial Security Force) | Security of industrial undertakings, airports and key installations |
| ITBP (Indo-Tibetan Border Police) | Guards the India-China border along the Himalayas |
| SSB (Sashastra Seema Bal) | Guards the India-Nepal and India-Bhutan borders |
The Assam Rifles is the oldest paramilitary force (guards the India-Myanmar border; administrative control with the Ministry of Home Affairs, operational control with the Army). The NSG (National Security Guard) is the elite counter-terror and counter-hijack force. The Special Protection Group (SPG) protects the Prime Minister. For force-level detail see the five forces.
| Agency | Role |
|---|---|
| IB (Intelligence Bureau) | Internal intelligence; under the Ministry of Home Affairs |
| RAW (Research and Analysis Wing) | External intelligence; under the Cabinet Secretariat |
| NIA (National Investigation Agency) | Federal counter-terror investigation agency, created after the 2008 Mumbai attacks (NIA Act, 2008) |
| NTRO | Technical intelligence |
| NCB (Narcotics Control Bureau) | Drug-trafficking control |
| Enforcement Directorate (ED) | Financial crime and money laundering |
| NSCS / NSA | The National Security Council Secretariat, headed by the National Security Adviser |
The legal architecture (UAPA, AFSPA and the disturbed-area mechanism, preventive detention under Article 22, the NHRC's special rule for armed-forces complaints under Section 19) is covered in human rights and internal security. The human-rights lens is the CAPF-distinctive angle: deployment is lawful, but it operates under rights safeguards and NHRC oversight.