India and Thailand Deepen Defence Ties: The Underreported Maritime Angle Behind the Bangkok Dialogue

India and Thailand have once again moved closer on defence and regional security. The two countries held the 10th India-Thailand Defence Dialogue in Bangkok on June 16, 2026, reviewing the full spectrum of bilateral defence cooperation and exchanging views on regional and global security developments.

The meeting was co-chaired by Shri Satyajit Mohanty, Joint Secretary, Ministry of Defence, Government of India, and Admiral Nuttapol Diewvanich, Deputy Permanent Secretary for Defence, Thailand.

On the surface, this may look like another scheduled bilateral meeting. But the timing and focus of the dialogue make it much more important. The discussions come at a time when the Indo-Pacific is witnessing sharper strategic competition, growing maritime risks, supply-chain concerns and increasing attention on the Bay of Bengal and the Andaman Sea.

For India, Thailand is not just another Southeast Asian partner. It is a maritime neighbour, an ASEAN member, a BIMSTEC partner and a key link between South Asia and Southeast Asia. For Thailand, India is an important power in the Indian Ocean and a natural partner under its Act West approach. Together, both countries are trying to build a defence relationship that is practical, steady and linked to real security needs.

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Ten Editions, One Growing Partnership

Senior defence officials from both countries led the meeting. Satyajit Mohanty, Joint Secretary, Ministry of Defence represented India, and Nuttapol Diewvanich, Deputy Permanent Secretary for Defence represented Thailand.

According to India's Ministry of Defence, both sides reviewed their ongoing defence activities. They also talked about new ways to work together. Such high-level meetings happen regularly. This helps both countries stay informed. It also keeps them aligned on shared goals.

The Real Story: An Eastern Maritime Security Chain

The most important but underreported angle is the geography of this partnership.

Thailand sits close to the Andaman Sea and acts as a bridge between the Bay of Bengal and mainland Southeast Asia. India’s Andaman and Nicobar Islands are also central to India’s eastern maritime strategy. This makes India-Thailand defence cooperation important for monitoring sea lanes, responding to maritime threats, securing trade routes and improving regional coordination.

In simple terms, this partnership helps India strengthen its eastern maritime flank.

Most defence stories describe the Indo-Pacific in broad terms. But the India-Thailand relationship has a very specific maritime logic. Both countries have an interest in keeping the sea routes of the Bay of Bengal, Andaman Sea and wider Indo-Pacific open, stable and secure. This includes cooperation against illegal activities at sea, better information sharing, coordinated patrols, humanitarian assistance, disaster relief and stronger naval engagement.

As trade, energy flows and supply chains become more dependent on secure sea lanes, such cooperation becomes more than a diplomatic formality. It becomes a strategic necessity.

Core Pillars Of The India & Thailand Defence Partnership

The talks covered many topics. This was not a one-issue meeting. Officials spoke about several areas of cooperation. They also discussed ways to grow the India-Thailand relationship further.

• Defence manufacturing and industry partnerships.
• Research and innovation in defence technology.
• Building stronger military capabilities.
• Training programmes for armed forces.
• Maritime cooperation and joint patrols.

The Ministry of Defence confirmed these focus areas. This proves the relationship is growing beyond just talks. Both countries now want real, working partnerships in defence production. 

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Why Thailand Matters to India’s Act East Policy

Thailand occupies a special place in India’s Act East Policy. It is a member of ASEAN, a BIMSTEC partner and a country that connects India to mainland Southeast Asia. India and Thailand also share historical, cultural and people-to-people ties, but the strategic importance of the relationship has grown in recent years.

India’s Act East Policy and Thailand’s Act West approach complement each other. This gives both countries a common framework to expand cooperation in defence, connectivity, trade, technology and regional security.

The 2025 elevation of India-Thailand relations to a Strategic Partnership added new political weight to the relationship. During Prime Minister Narendra Modi’s visit to Thailand in April 2025, both countries agreed to deepen cooperation across several sectors, including defence, security, technology, connectivity, trade, tourism and people-to-people ties.

ASEAN, BIMSTEC and the Indo-Pacific Link

One of the most important parts of the Bangkok dialogue was the discussion on regional and multilateral defence frameworks, including ASEAN-led mechanisms.

This matters because Thailand gives India an important diplomatic and strategic bridge into Southeast Asia. India has consistently supported ASEAN centrality in the Indo-Pacific. At the same time, Thailand is also part of BIMSTEC, which connects South Asia and Southeast Asia through the Bay of Bengal.

This dual role makes Thailand valuable for India. It is one of the few countries that sits comfortably in both India’s Act East vision and the Bay of Bengal regional framework. That is why the India-Thailand defence relationship should not be seen only as a bilateral story. It is also part of India’s wider effort to build trusted partnerships across the eastern Indian Ocean and Southeast Asia

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The Trade And Economic Backdrop

Defence ties don't grow on their own. They often grow alongside strong trade ties. India and Thailand also share a healthy trade relationship.

Bilateral trade between the two countries was around US $15-17 billion in FY24, according to IBEF. This makes Thailand one of India's top trading partners within ASEAN.

Strong trade usually leads to stronger trust. And stronger trust often leads to stronger defence ties. Both governments seem to understand this link well.

Why This Dialogue Series Matters

This dialogue is not new. It has a long history. The 9th edition took place in New Delhi in December 2024. Before that, the 8th dialogue was held in Bangkok in 2023. Each meeting adds something new to the partnership.

These regular talks help build trust. They also let both militaries fix small problems early. Strong defence ties don't come from big announcements alone. They come from steady, regular contact.

The Road Ahead For This Partnership

The next phase of India-Thailand defence cooperation will depend on implementation. The two countries have already identified the right themes: maritime security, training, capacity building, defence manufacturing, research, innovation and regional cooperation.

Now the focus should shift from dialogue to delivery.

Possible next steps may include stronger naval exchanges, more structured joint patrols, defence industry roadshows, start-up and research partnerships, joint work on coastal surveillance, greater cooperation in disaster response and deeper coordination in ASEAN-led and BIMSTEC-linked platforms.

The 10th India-Thailand Defence Dialogue shows that both countries are serious about building a long-term security partnership. But its real importance lies in what it signals: India is quietly strengthening its eastern maritime network, and Thailand is becoming an increasingly important partner in that effort.

In a region where stability depends not only on big powers but also on trusted middle partnerships, India and Thailand are building exactly the kind of quiet, practical and future-focused defence relationship that the Indo-Pacific needs.