Geostrategic Importance of Bangladesh in India’s Foreign Policy

Few countries occupy a place in India’s foreign policy as central as Bangladesh. Wrapped almost entirely by Indian territory on three sides, with only a short stretch in the southeast touching Myanmar, Bangladesh sits at the meeting point of South Asia and Southeast Asia. This geography is not just a map fact. It shapes trade routes, security calculations, river diplomacy, and the contest for influence with China. Understanding why Bangladesh matters so much to New Delhi means looking at where it sits, what flows through it, and how the relationship has shifted in recent years.

Where Bangladesh sits and why location is everything 🔗

Bangladesh shares a land border of roughly 4,096 kilometres with India, the longest land boundary India has with any neighbour. This border touches five Indian states: West Bengal, Assam, Meghalaya, Tripura, and Mizoram. To the southeast, a small section meets Myanmar. The country also opens onto the Bay of Bengal, giving it direct access to one of the most strategically watched parts of the Indian Ocean Region.

This position makes Bangladesh a natural bridge. It is the link that can connect mainland India to its northeastern states, and the gateway that ties South Asia to Southeast Asia. Because of this, Bangladesh has become a meeting point for several Indian foreign policy doctrines at once: the Neighbourhood First policy, the Act East policy, and the SAGAR (Security and Growth for All in the Region) maritime vision. Its geography turns it into a natural corridor between two large regions, which is exactly why both India and rival powers pay close attention to it.

The lifeline of rivers 🔗

Bangladesh is defined by water. Three major river systems shape its land and its relationship with India: the Ganges, the Brahmaputra, and the Meghna. These rivers begin upstream in India and flow into Bangladesh, which means that what India does with the water directly affects life downstream. In total, India and Bangladesh share 54 rivers, but formal water-sharing agreements have been signed for only a handful of them.

The Ganges treaty and its 2026 deadline 🔗

The most important water agreement is the Ganges Water Sharing Treaty, signed in 1996. It governs how the two countries divide Ganges water at the Farakka Barrage, a structure in West Bengal built to divert water into the Hooghly River and keep Kolkata Port navigable. The treaty fixed a 30-year framework and is set to expire in December 2026, with officials from both countries already in talks over its renewal.

The stakes are high. The 1996 agreement guaranteed that during the dry season, both countries would receive a share of the flow, with Bangladesh assured a minimum of 35,000 cubic feet per second under certain conditions. For Bangladesh, reduced flow during the dry months means problems with agriculture, fisheries, salinity, and drinking water in its southwest. One Bangladeshi minister recently framed the treaty’s renewal as a “life and death” issue, signalling just how sensitive this matter is for Dhaka.

The Teesta knot 🔗

If the Ganges treaty is the present concern, the Teesta River is the long-standing one. A Teesta water-sharing deal was ready to be signed in 2011, but it was blocked at the last moment by West Bengal Chief Minister Mamata Banerjee, who argued it would hurt her state. The deal has remained frozen since. This illustrates an important feature of India’s foreign policy: relations with neighbours are not decided in New Delhi alone. State governments, especially border states, carry real weight in negotiations over shared resources.

The economic relationship 🔗

Trade ties have become one of the strongest pillars of the relationship. Bilateral trade reached about USD 13 billion in 2023-24, making Bangladesh India’s largest trade partner in the subcontinent. India enjoys duty-free access on most tariff lines under the South Asian Free Trade Area (SAFTA) framework, and the two economies have grown deeply interlinked across power, energy, and connectivity.

India has also been a major development partner, extending multiple lines of credit worth several billion dollars to finance railways, ports, power transmission, and roads in Bangladesh. At one point there were nearly 70 ongoing bilateral institutional mechanisms covering security, energy, rivers, connectivity, and more.

But the relationship is uneven. Trade is heavily tilted in India’s favour, with Indian exports dominating the flow. This persistent trade gap has long been a point of concern for Dhaka, which sees the imbalance as a sign that the partnership is not fully equal. Managing this asymmetry is one of the quieter but constant challenges in the relationship.

Security: insurgency, borders, and trust 🔗

Security cooperation is where the relationship has paid some of its biggest dividends. India’s northeastern states have historically faced insurgencies, and several armed groups once used Bangladeshi territory as a safe haven. During the period of close cooperation, Dhaka cracked down on insurgent groups operating from its soil, including outfits linked to Assam and Bodoland. This action greatly boosted trust between the two governments and improved conditions along India’s sensitive northeastern frontier.

Border management remains a daily concern. The long boundary is managed through fencing, joint inspection of boundary pillars, and regular talks between the two border-guarding forces. India has pushed for the completion of border fencing as a long-term security measure. Yet the same border is also a source of friction, particularly over the politically charged issue of cross-border migration, which Indian policymakers treat as a serious demographic and security matter.

The China card 🔗

No discussion of Bangladesh’s strategic value is complete without China. Beijing sees Bangladesh as a key piece in its plans for the South Asian region and the wider Indo-Pacific. China has poured investment into Bangladeshi infrastructure and defence, and has offered generous tariff concessions on Bangladeshi imports. For India, this presence is a concern because it fits into a broader pattern of Chinese engagement with smaller states across the Indian Ocean, sometimes described as the “String of Pearls.”

This is why analysts often talk about Bangladesh playing a “China card.” By keeping options open with Beijing, Dhaka gains leverage in its dealings with New Delhi. India, in turn, has reason to invest in the relationship not purely for economic returns but to limit the erosion of its influence in its own neighbourhood. The competition is not only about money. It is about who shapes the strategic environment around the Bay of Bengal.

The transit route to the Northeast 🔗

This is perhaps the single most practical reason Bangladesh matters to India. India’s eight northeastern states are connected to the rest of the country only through the Siliguri Corridor, a narrow strip of land in West Bengal roughly 22 kilometres wide at its narrowest. Nicknamed the “Chicken’s Neck,” it is the sole land link between mainland India and the Northeast, carrying nearly all road and rail movement for the region. Its narrowness makes it a logistical bottleneck and a recognised security vulnerability.

Bangladesh offers a way around this problem. Routes through Bangladeshi territory can dramatically cut distances. For example, to reach a sea port, traders from Agartala in Tripura have traditionally travelled around 1,600 kilometres to Kolkata via the Chicken’s Neck, instead of less than 600 kilometres through Bangladesh, or just about 200 kilometres to reach the nearby port of Chittagong (Chattogram). Transit arrangements through Bangladesh, including the use of its ports and waterways, can therefore slash transport costs and time for the entire Northeast.

This makes Bangladesh essential to India’s Act East policy, which aims to deepen ties with Southeast Asia. Better connectivity through Bangladesh could reshape the economy of the Northeast, turning a landlocked, hard-to-reach region into a trading hub. The dependence runs deep enough that any disruption in relations directly threatens the smooth functioning of this connectivity.

A relationship that shifts with politics 🔗

The relationship has never been static. The period from 2009 to 2024, under Prime Minister Sheikh Hasina, is often called the “Golden Chapter” of India-Bangladesh ties. It saw the resolution of the long-pending Land Boundary Agreement in 2015, a surge in connectivity projects, strong counterinsurgency cooperation, and booming trade. Bangladesh was held up as the most successful example of India’s Neighbourhood First policy.

That changed in August 2024, when protests forced Hasina to leave the country, and an interim government took over. The political shift introduced fresh uncertainty into the relationship, with new questions about the direction of Dhaka’s foreign policy and its growing engagement with China and Pakistan. The change reminded New Delhi of an old lesson: a relationship built heavily on ties with one leader or party can become fragile when politics shifts.

This is why many analysts now argue that the relationship needs to be embedded in durable institutional frameworks rather than personal goodwill. Regular intelligence-sharing platforms, coordinated border management, formal defence dialogues, and structured mechanisms for water, trade, and migration are seen as the way to make cooperation outlast any single government. The underlying geography that makes Bangladesh strategically important does not change, even when governments do.

Why this matters for India’s foreign policy 🔗

Pulling these threads together, Bangladesh occupies a unique place in India’s strategic thinking. Its location makes it the key to connecting the Northeast and accessing Southeast Asia. Its rivers tie the two countries together in a shared dependence that requires constant diplomacy. Its economy is India’s largest trade partner in the subcontinent. Its security cooperation protects India’s vulnerable frontier. And its relationship with China makes it a theatre of strategic competition.

Each of these dimensions reinforces the others. Strong economic ties build the trust needed for security cooperation. Connectivity through Bangladesh reduces India’s dependence on the fragile Chicken’s Neck. And maintaining a healthy relationship limits the space available for rival powers. For all these reasons, neglecting Bangladesh would be costly for India’s wider regional and global ambitions.

What do you think? If India’s connectivity to its own Northeast depends so heavily on a neighbour’s goodwill, how should it balance building alternative routes against deepening cooperation with Bangladesh? And when a relationship is tied closely to one government, what can India do to make sure cooperation survives political change in Dhaka?

References

1. https://www.ahcirajshahi.gov.in/page/bilateral-relations/
2. https://cgs-bd.com/article/23316/Bangladesh%E2%80%99s-Geopolitical-Position-Provides-for-Unique-Opportunities
3. https://theinsighta.com/p/india-bangladesh-ties-at-a-crossroads
4. https://www.shankariasparliament.com/current-affairs/the-ganges-water-sharing-treaty
5. https://www.thedailystar.net/slow-reads/big-picture/news/why-the-ganges-treaty-must-not-fail-4151981
6. https://www.drishtiias.com/daily-updates/daily-news-analysis/india-bangladesh-relations-9
7. https://eastasiaforum.org/2026/04/23/india-bangladesh-reset-requires-structure-beyond-sentiment/
8. https://thediplomat.com/2025/12/indias-bangladesh-dilemma-strategic-partner-or-political-liability/
9. https://www.deccanherald.com/opinion/new-thrust-in-ties-with-bangladesh-needed-1071751.html
10. https://en.wikipedia.org/wiki/Siliguri_Corridor
11. https://www.worldbank.org/en/news/opinion/2017/09/27/bangladesh-corridor-vital-indias-act-east-policy
12. https://blogs.worldbank.org/en/endpovertyinsouthasia/bangladesh-corridor-vital-india-s-act-east-policy
13. https://asiasociety.org/policy-institute/bangladeshs-shifting-geopolitics-why-india-cannot-afford-wait