An organisation was built in 2001 to support an officer who did not exist until 2019.
That is the most instructive fact about Headquarters Integrated Defence Staff, which marked its Silver Jubilee on 1 October 2026 — twenty-five years since its establishment in New Delhi on 1 October 2001, a date now observed as Tri-Service Day.
Why it exists
In 1999, after the Kargil conflict, the Government of India constituted the Kargil Review Committee on 29 July 1999, chaired by K. Subrahmanyam. Its remit went well beyond the immediate intelligence failure; it recommended a review of the entire national security framework and of how India takes decisions on defence.
A Group of Ministers examined those recommendations and, in 2001, proposed a set of structural reforms. Three institutions came out of that process: Headquarters Integrated Defence Staff, the Defence Intelligence Agency, and — on paper — the post of Chief of Defence Staff.
The first two were created. The third was not.
The reasons were political and institutional rather than military: disagreement about how much authority a single officer should hold over three services, concern within the services about losing autonomy, and an absence of political appetite for a fight about it. So HQ IDS came into being on 1 October 2001 as the integrated staff of a CDS who had not been appointed.
It was headed instead by the Chief of Integrated Defence Staff to the Chairman, Chiefs of Staff Committee — the CISC. That title is unwieldy and it is also an exact description of the problem: the Chiefs of Staff Committee was chaired by whichever service chief was senior-most, by rotation, as an additional duty alongside running his own service. HQ IDS reported to a part-time chairman who changed periodically.
That arrangement lasted eighteen years. The Prime Minister announced the intention to create a CDS on 15 August 2019; the Cabinet Committee on Security approved it on 24 December 2019; and General Bipin Rawat was appointed India's first Chief of Defence Staff on 31 December 2019. A Department of Military Affairs was created within the Ministry of Defence, with the CDS as its Secretary — which is the arrangement today, the CDS being both a military officer and the head of a civil department.
The current CDS and Secretary, Department of Military Affairs is General N.S. Raja Subramani; the current CISC is Air Marshal Tejinder Singh. Both addressed the Silver Jubilee event, 'Trishakti Manthan', held under the theme "Future readiness through jointness & Integration".
What jointness actually means
"Jointness" is used loosely, so it is worth being precise. It does not mean the three services being friendly, and it does not mean them holding exercises together. It means that land, maritime, air, space, cyber and cognitive capability can be planned and employed as a single instrument rather than three instruments that coordinate.
That requires specific, unglamorous things, and the list of what HQ IDS has built is a list of exactly those:
- Joint operational doctrines — agreed written statements of how the services will fight together, so that planning does not start from first principles each time.
- Joint training frameworks — officers of each service learning the others' capabilities and limitations, which is what makes a plan realistic.
- Integrated exercises — testing the doctrine against reality.
- Coordinated Humanitarian Assistance and Disaster Relief (HADR) mechanisms — the task India's military performs most often, and one that is inherently joint.
HQ IDS also runs the institutional platforms on which these are argued out: Ran Samwad, the Joint Commanders' Conference (JCC), and the Combined Operational Review and Evaluation (CORE) Programme — the last of which is the forum where the three services argue things out in practice, alongside the tri-services course on the future of warfare run at the Manekshaw Centre.
And it has taken the lead on the domains where no single service has a natural claim — cyber, space and artificial intelligence — while promoting collaboration with research organisations, academia and industry for indigenous capability under Atmanirbharta in Defence. This is where an integrated staff has the clearest advantage: a new domain has no incumbent service to defend its turf.
The Silver Jubilee itself featured a commemorative book and film, CDS Unit Citations conferred on personnel, and a wreath-laying at the National War Memorial and Museum.
The part that is still unfinished
An honest account has to name what has not happened.
India has two operational tri-service commands. The Andaman and Nicobar Command, India's only tri-service geographic command, and the Strategic Forces Command, which handles the nuclear arsenal. Everything else remains organised by service, with each service running its own regional commands whose boundaries do not coincide with the others'.
The reform that would complete the 2001 agenda is theatre commands — reorganising forces so that all assets in a geographic theatre answer to a single commander, regardless of service. This has been under discussion for years. It has not been implemented.
The arguments against are not frivolous. The Air Force has consistently argued that air power's defining advantage is that it can be concentrated anywhere at short notice, and that parcelling aircraft out to theatre commanders would fragment a small force that derives its strength from being centrally held. The Navy's concerns are different again, since maritime theatres do not map onto land boundaries. These are genuine professional disagreements about how to employ force, not merely institutional self-interest — though institutional self-interest is present too.
So the correct summary of twenty-five years is this. HQ IDS has delivered the software of jointness — doctrine, training, joint planning, integrated exercises, and leadership of the new domains. The hardware of jointness, meaning command structures that actually place forces under a single operational commander, remains largely undone. The organisation now has the CDS it was built for, which is the precondition for the second half. Whether the second half happens is a decision for the government rather than for the staff.
🔑 Revision block
- HQ Integrated Defence Staff established 1 October 2001, New Delhi. The date is observed as Tri-Service Day. Silver Jubilee 1 October 2026, theme "Future readiness through jointness & Integration", event 'Trishakti Manthan'.
- Kargil Review Committee constituted 29 July 1999, chaired by K. Subrahmanyam.
- A Group of Ministers in 2001 recommended structural reform. Three outcomes: HQ IDS, the Defence Intelligence Agency, and the CDS post — the last not acted on at the time.
- For 18 years HQ IDS was headed by the Chief of Integrated Defence Staff to the Chairman, Chiefs of Staff Committee (CISC), the COSC being chaired by the senior-most service chief by rotation as an additional duty.
- CDS timeline: announced by the PM on 15 August 2019; approved by the Cabinet Committee on Security on 24 December 2019; General Bipin Rawat appointed first CDS on 31 December 2019.
- A Department of Military Affairs was created in the Ministry of Defence, with the CDS as its Secretary.
- Current CDS and Secretary DMA: General N.S. Raja Subramani. Current CISC: Air Marshal Tejinder Singh.
- Jointness = planning and employing land, maritime, air, space, cyber and cognitive capability as a single instrument — not merely cooperation.
- HQ IDS outputs: joint operational doctrines, joint training frameworks, integrated exercises, coordinated HADR mechanisms; leadership on cyber, space and AI.
- Institutional platforms: Ran Samwad, Joint Commanders' Conference (JCC), Combined Operational Review and Evaluation (CORE) Programme.
- India's two tri-service commands: Andaman and Nicobar Command (the only tri-service geographic command) and Strategic Forces Command (nuclear).
- Theatre commands remain unimplemented. The Air Force's principal objection is that air power's advantage lies in being centrally held and concentrated at short notice.
- Silver Jubilee featured a commemorative book and film, CDS Unit Citations, and a wreath-laying at the National War Memorial and Museum.
🎯 Practice MCQs
Q1. Headquarters Integrated Defence Staff was established on: (a) 1 October 2001 (b) 29 July 1999 (c) 24 December 2019 (d) 15 August 2019
→ (a) 1 October 2001, now observed as Tri-Service Day. The other three dates belong to the Kargil Review Committee's constitution, the CCS approval of the CDS post, and the Prime Minister's announcement respectively.
Q2. The Kargil Review Committee was chaired by: (a) Gen K.V. Krishna Rao (b) Naresh Chandra (c) K. Subrahmanyam (d) Arun Singh
→ (c) K. Subrahmanyam chaired the Committee, constituted on 29 July 1999. Its recommendations, examined by a Group of Ministers, produced HQ IDS, the Defence Intelligence Agency and the eventual CDS post.
Q3. For the eighteen years between its establishment and the creation of the CDS post, HQ IDS was headed by the: (a) Defence Secretary (b) Chief of Integrated Defence Staff to the Chairman, Chiefs of Staff Committee (c) Senior-most serving service chief in his own capacity (d) Principal Scientific Adviser to the Ministry of Defence
→ (b) The CISC headed HQ IDS. The Chiefs of Staff Committee itself was chaired by the senior-most service chief by rotation, as an additional duty — which is what the arrangement was designed to improve upon.
Q4. The post of Chief of Defence Staff was approved by the Cabinet Committee on Security in: (a) 2001 (b) 2015 (c) 2021 (d) December 2019
→ (d) The CCS approved it on 24 December 2019, and General Bipin Rawat was appointed on 31 December 2019. The Group of Ministers had recommended the post as far back as 2001.
Q5. The Chief of Defence Staff also holds which civil appointment? (a) Defence Secretary (b) Secretary, Department of Defence Production (c) Secretary, Department of Military Affairs (d) Chairman, Defence Research and Development Organisation
→ (c) The CDS is Secretary of the Department of Military Affairs, created in the Ministry of Defence in 2019 — making the office simultaneously a military appointment and the head of a civil department.
Q6. Which of the following is India's only tri-service geographic command? (a) Andaman and Nicobar Command (b) Strategic Forces Command (c) Western Command (d) Southern Naval Command
→ (a) The Andaman and Nicobar Command is the only tri-service geographic command. Strategic Forces Command is also tri-service but is functional, handling the nuclear arsenal rather than a geographic area.
Q7. 'Theatre commands', the reform still under discussion, would organise forces so that: (a) Each service retains its own regional commands with aligned boundaries (b) All assets in a geographic theatre answer to a single commander regardless of service (c) The three service chiefs jointly command each region in rotation (d) Operational command passes to the Department of Military Affairs
→ (b) A theatre command places all assets in a theatre under one operational commander irrespective of service. It is the structural half of jointness that remains unimplemented.
Q8. The Indian Air Force's principal professional objection to theatre commands has been that: (a) It lacks sufficient officers of the required rank (b) Air operations are governed by a separate statute (c) Air power derives its advantage from being centrally held and concentrated at short notice (d) Theatre commands would require constitutional amendment
→ (c) The argument is that a relatively small air force gains its strength from being centrally held, so that it can be concentrated wherever needed; distributing aircraft among theatre commanders would fragment that advantage.
Q9. 'Ran Samwad', the Joint Commanders' Conference and the CORE Programme are: (a) Tri-service exercises conducted with foreign partners (b) Training establishments under the Department of Military Affairs (c) Procurement categories under the Defence Acquisition Procedure (d) Institutional platforms maintained by HQ IDS for structured joint deliberation
→ (d) All three are HQ IDS platforms for structured deliberation on joint warfighting and contemporary security challenges — the institutional mechanisms through which jointness is actually negotiated.
Q10. Besides HQ IDS, which other institution was created as a direct outcome of the post-Kargil reform process? (a) The National Security Council (b) The Defence Intelligence Agency (c) The Defence Research and Development Organisation (d) The National Investigation Agency
→ (b) The Defence Intelligence Agency was created alongside HQ IDS from the same process. The DRDO long predates it, the National Security Council was established in 1998, and the NIA was created after the 2008 Mumbai attacks.
📋 How this gets asked (PYQ pattern)
Defence organisation is among the highest-yield areas in the NDA paper, and this topic is at its centre.
The first pattern is the post-Kargil chronology, which candidates must hold in order: Kargil conflict 1999, Kargil Review Committee July 1999, Group of Ministers 2001, HQ IDS and DIA 2001, CDS announced August 2019 and appointed December 2019, Department of Military Affairs 2019. The gap between the 2001 recommendation and the 2019 implementation is itself examinable, because it is the sort of detail that distinguishes a prepared candidate.
The second is command structures. The seven Army commands, the three Navy commands, the seven Air Force commands, plus the two tri-service commands — Andaman and Nicobar (geographic) and Strategic Forces (functional). The geographic-versus-functional distinction is the point most often tested.
The third is who holds which appointment, and this changes, so it requires currency rather than memory alone. CDS, the three service chiefs, the CISC, the Defence Secretary. Papers set in a given year reflect the incumbents of that year.
The fourth is committees and their subjects: the Kargil Review Committee on national security after 1999, the Naresh Chandra Task Force on defence reform, the Shekatkar Committee on enhancing combat capability and rebalancing expenditure. A question naming a committee and asking its subject is standard, and these three are the ones that recur.
Preparing for NDA? Learn defence reform as a timeline, not a list — each institution exists because something specific went wrong, and the paper often asks for the cause rather than the date. Build the base with our NDA general ability notes, follow the daily NDA current affairs, and prepare with our faculty in the upcoming Cavalier courses in Delhi.
✍️ Written by Col D.N. Sharma — Defence studies faculty at The Cavalier. Reviewed by the Cavalier Faculty Desk.