The Department of Military Affairs, or DMA, is a department within the Ministry of Defence. It was created in 2020 as part of India’s higher defence management reforms after the creation of the post of Chief of Defence Staff.
The Chief of Defence Staff heads the DMA as its Secretary. This makes DMA important because it brings military expertise directly into the Ministry of Defence’s decision-making structure.
The basic purpose of DMA is to improve jointness, integration and coordination among the Army, Navy and Air Force.
Background
India’s defence structure was historically service-specific. The Army, Navy and Air Force planned procurement, training, logistics and operations largely through separate institutional channels.
After the Kargil War, 1999, the Kargil Review Committee and later the Group of Ministers highlighted the need for better integration among the armed forces.
The CDS post and DMA were created to address this structural gap. In 2019, the Union Cabinet approved the creation of the CDS post and decided that the CDS would head the Department of Military Affairs in the Ministry of Defence. The government later stated that work of 23 sections, along with around 160 civilian officers and staff, was transferred from the Department of Defence to DMA.
Position within Ministry of Defence
The Ministry of Defence has multiple departments, including:
• Department of Defence
• Department of Military Affairs
• Department of Defence Production
• Department of Defence Research and Development
• Department of Ex-Servicemen Welfare
DMA deals specifically with military affairs, while the Department of Defence continues to deal with the wider defence of India and defence policy matters.
This separation is important because DMA gives the armed forces a more direct institutional role inside the Ministry, but it does not remove civilian control over defence policy.
Major Functions
DMA is responsible for matters relating to the three armed forces, Integrated Defence Staff, Territorial Army and certain procurement matters.
Its major functions include:
• Promoting jointness among Army, Navy and Air Force
• Facilitating restructuring of military commands
• Supporting creation of integrated theatre commands
• Improving joint planning and staffing
• Promoting joint training among services
• Encouraging common logistics and maintenance systems
• Supporting indigenous defence equipment use
• Coordinating with Integrated Defence Staff
• Handling service-specific military matters assigned to it
The CDS, as head of DMA, also functions as the Permanent Chairman of the Chiefs of Staff Committee, Principal Military Adviser to the Defence Minister on tri-service matters, member of the Defence Acquisition Council, and Military Adviser to the Nuclear Command Authority.
Link with CDS
DMA and CDS are closely linked.
The CDS provides single-point military advice on tri-service issues, while DMA gives an institutional platform to implement jointness and integration.
The CDS does not exercise direct military command over the three Service Chiefs. The Army Chief, Navy Chief and Air Chief continue to command their respective services.
The CDS and DMA mainly work on:
• Tri-service integration
• Theatre command reforms
• Joint procurement priorities
• Common training and logistics
• Avoiding duplication among services
• Long-term military modernisation
This distinction is important because the CDS is not a super service chief. The role is mainly integrative and advisory, not direct command over all services.
Theatre Commands
One of the most important tasks associated with DMA is theaterisation.
Theaterisation means reorganising the armed forces into integrated commands where assets of the Army, Navy and Air Force work under one operational structure for a specific theatre or function.
Instead of each service planning separately for the same region, a theatre command brings land, air, maritime, cyber and space capabilities into one integrated operational framework.
Theaterisation can improve:
• Joint war-fighting capability
• Faster decision-making
• Better resource utilisation
• Reduced duplication
• Integrated logistics
• Common operational planning
• Stronger response to multi-domain threats
This is important because modern warfare is no longer service-specific. Drones, missiles, cyber attacks, space assets, electronic warfare and air defence require integrated command and control.
Governance Significance
DMA is a major institutional reform because it changes how military advice enters the defence policy system.
Earlier, the Ministry of Defence was often criticised for having limited uniformed military presence inside its decision-making structure. DMA partly corrects this by placing the CDS and military officers within the formal departmental structure of the Ministry.
Its governance significance lies in:
• Better civil-military coordination
• Direct military input in policy execution
• Improved tri-service planning
• Faster coordination among services
• Stronger focus on jointness
• More integrated procurement planning
However, this does not mean militarisation of the Ministry. Civilian political control remains with the Defence Minister and the Cabinet Committee on Security.
Importance
DMA is important because India faces a complex security environment.
On the continental side, India faces the China challenge along the LAC and Pakistan-backed threats along the western front. On the maritime side, the Indian Ocean is witnessing increasing strategic competition. At the same time, modern threats include drones, missiles, cyber warfare, space-based surveillance and information warfare.
DMA helps India move from single-service planning to integrated defence preparedness.
Its importance can be seen in:
• Higher defence management reform
• Jointness among armed forces
• Integrated theatre command planning
• Better procurement prioritisation
• Modernisation of military structures
• Stronger civil-military interface
• Preparation for multi-domain warfare
Concerns
The biggest challenge is implementation. Creating a department is easier than changing service cultures, command structures and institutional habits.
Theaterisation requires the Army, Navy and Air Force to share assets, authority and operational control. This can create resistance because each service has its own doctrine, traditions and priorities.
Another concern is clarity of roles between the DMA and the Department of Defence. The Allocation of Business Rules identify functions of different departments to avoid duplication, but coordination still remains crucial.
Key concerns include:
• Service rivalry
• Slow progress on theaterisation
• Need for clear command responsibility
• Coordination between DMA and Department of Defence
• Balancing continental and maritime priorities
• Avoiding overlap in procurement decisions
• Ensuring civilian supremacy and political control
• Building joint doctrine and communication systems
Conclusion
The Department of Military Affairs is a key reform in India’s defence governance. Headed by the CDS, it aims to improve jointness, integration, theatre command planning and military coordination inside the Ministry of Defence.
Its success will depend on whether India can move beyond service-wise planning and build genuine tri-service structures suited to modern multi-domain warfare.
