India-Bangladesh: rivers, borders and the reset

Bangladesh is the neighbour India midwifed. The 1971 Liberation War, in which India armed, trained and sheltered the Mukti Bahini, created a debt of gratitude that powered five decades of partnership. It also created the expectation, in Delhi, that Dhaka would never drift. August 2024 ended that assumption.

The exam frame is transformation under stress: a golden phase built on settled boundaries, power trade and connectivity, now being renegotiated with a Dhaka that is reopening to both Beijing and Islamabad. Rivers, borders and the reset, in that order.

1971: the birth that binds

India's role in the Liberation War remains the relationship's founding capital: military intervention in December 1971, shelter for ten million refugees, and recognition of Bangladesh before any other country. Prime Ministers on both sides have called the years of close partnership the "Sonali Adhyay", the golden phase.

The legacy cuts both ways. Gratitude powered cooperation, but it also bred a Delhi habit of treating Dhaka's friendship as permanent, which made the 2024 rupture feel like betrayal rather than politics.

Settling the border file

Few bilateral achievements match the boundary settlement. The 2015 Land Boundary Agreement exchanged enclaves and settled the land frontier, and the maritime boundary delimitation closed the Bay of Bengal file. Together they removed the territorial irritants that poison most South Asian relationships.

What remains is management, not demarcation: a zero-fatality border doctrine to end civilian casualties, smart fencing and surveillance technology to curb smuggling without choking legitimate movement, and continued cooperation against insurgent safe havens, the ULFA crackdowns of the Hasina years being the model.

Rivers: Ganga works, Teesta waits

India and Bangladesh share 54 rivers, but only two water treaties exist. The Ganga Waters Treaty of 1996, with its 30-year term, is the working proof that sharing can be institutionalised; the Kushiyara agreement added a second. The Teesta, though, is the perennial failure: a 2011 draft for an equal split was never signed, hostage to West Bengal's objections and Dhaka's impatience.

The file is about to get harder. The Ganga treaty is reported to expire in December 2026, and renegotiation must now handle changed river morphology and Farakka barrage disputes in a far frostier political climate. Delhi's proposed answer is basin-wide management of all 54 rivers through the Joint Rivers Commission rather than river-by-river brinkmanship.

The August 2024 reset

Sheikh Hasina's resignation and flight to India amid mass protests in August 2024 was the relationship's sharpest rupture since 1971. Reported extradition demands from Dhaka have become a litmus test; reported attacks on Hindu temples and minorities send political ripples into India; and the "India Out" campaign on Bangladeshi social media and campuses has mainstreamed anti-India rhetoric among the young.

Delhi has responded with calibrated distance: withdrawing the trans-shipment facility that let Bangladeshi exports transit India, even as high-level contacts, reportedly including a 2026 foreign-minister visit on energy and security, signal gradual normalisation. The lesson being absorbed is that betting on a person is not a Bangladesh policy.

The upheaval installed a new cast of actors. Nobel laureate Muhammad Yunus took charge as chief adviser of the interim government, backed by student leaders of the uprising. That government banned all activities of the Awami League, and the Election Commission subsequently suspended the party's registration, shutting Sheikh Hasina's party out of electoral politics while she remained in exile in India.

The February 2026 general election was the first in three decades without the Awami League's boat symbol on the ballot. The Bangladesh Nationalist Party (BNP), led by Tarique Rahman, won a sweeping majority of over 200 of the 299 seats, with the Jamaat-e-Islami emerging as the second force. New Delhi must now rebuild its Bangladesh policy around a BNP-led government rather than a single leader, the very lesson the reset was supposed to teach.

The golden-phase economics

The material base of the partnership is formidable. Bangladesh is India's biggest trading partner in South Asia and the largest announced recipient of Indian Lines of Credit, over $8 billion since 2016, funding rail links like Akhaura-Agartala and the Khulna-Mongla port line. India reportedly exports over a gigawatt of power to Bangladesh, anchored by the Maitree joint-venture plant, and the Bangladesh-Bhutan-India-Nepal (BBIN) Motor Vehicle Agreement promises seamless sub-regional cargo movement.

People-to-people ties run on medicine and education: well over a million Bangladeshis reportedly visit India annually for treatment, business and study. Shared language and literature, Tagore and Nazrul claimed by both, make this the neighbourhood's densest cultural overlap.

Beijing and Islamabad re-enter

The reset has opened doors Delhi kept shut for fifteen years. China is reported as Bangladesh's largest trading and defence partner; Dhaka has re-engaged Beijing on the Teesta River Management Project; and the reported upgrade of the Lalmonirhat airfield near the Siliguri Corridor is read in Delhi as a red line.

Pakistan has moved too: the two countries reportedly began direct trade in 2025, with Dhaka importing Pakistani rice, alongside revived direct flights, simplified visas and reported security contacts. For Delhi, the nightmare is a coordinated squeeze, Beijing on the Teesta, Islamabad on the western imagination, with Dhaka as the venue.

The connectivity ledger and the 2026 deadlines

Connectivity with Bangladesh is a layered legal stack. A transit agreement signed in 2010 gives India transit facilities through Bangladesh on three modes of transport: inland water, rail and coastal shipping. A coastal shipping agreement signed in 2018 lets India use the Chattogram and Mongla ports to move goods to Tripura, Assam and Meghalaya, with no transit fees or customs duties for India. Five rail links are operational, the Akhaura-Agartala link was inaugurated in 2023, and the inland waterway route connects Tripura with India's National Waterways through Bangladesh.

Two 2026 deadlines will dominate the news cycle: the 1996 Ganga/Farakka Treaty expires in 2026 and needs renewal, with Dhaka wanting a long-term renewal and India preferring a flexible, data-based arrangement mindful of Bihar's flood concerns; and Bangladesh's graduation from Least Developed Country status in 2026, which will erode its trade preferences and make a Comprehensive Economic Partnership Agreement (CEPA) urgent for both sides.

The humanitarian and strategic markers: in 2018 India sent supplies for 300,000 Rohingya refugees under Operation Insaniyat; the India-Bangladesh Friendship Pipeline carries diesel to northern Bangladesh; and a Nepal-India-Bangladesh pact now enables cross-border electricity trade. On the China file, Beijing is Bangladesh's largest trade partner and defence supplier, and extended technical support for Bangabandhu-1, Bangladesh's first communication satellite.

The numbers: bilateral trade stood at $14.01 billion in 2023-24, making Bangladesh India's largest trading partner in South Asia, and the two share a 4,096.7 km border, India's longest land border with any country.

India-Bangladesh at a glance

What examiners keep asking

• Structure answers as legacy, settlement, stress: 1971 capital, the settled border file, then the 2024 reset and its drivers.
• Teesta is the standard "unresolved river" answer: contrast it with the Ganga treaty that works.
• For China-Pakistan angles, name the specifics: Lalmonirhat, Teesta project, direct rice trade.

Key Terms

• Coastal Shipping Agreement (2018): Lets India use Chattogram and Mongla ports for cargo to the Northeast, with no transit fees or customs duties.
• Bangladesh Nationalist Party: The Bangladesh Nationalist Party (BNP) is a major political party of Bangladesh founded by President Ziaur Rahman in September 1978. It promoted Bangladeshi nationalism as an alternative to the Awami League's Bengali nationalism and has alternated in power with the Awami League since democracy was restored in 1991. For UPSC it is relevant to India-Bangladesh relations, since BNP governments have historically been seen as cooler toward India than Awami League ones. BNP chairperson Khaleda Zia became Bangladesh's first woman prime minister in 1991.
• Ganga/Farakka Treaty (1996): The 30-year water-sharing treaty expiring in 2026, up for renewal.
• Land Boundary Agreement: The Land Boundary Agreement is the 2015 settlement between India and Bangladesh that exchanged 111 Indian enclaves in Bangladesh for 51 Bangladeshi enclaves in India, ratified by the 100th Constitutional Amendment Act, 2015. It also settled adverse possessions and undemarcated boundary stretches. It ended decades of statelessness for enclave dwellers. For UPSC, it matters for international relations, polity (Article 368 territory cession) and federal geography. 100th Constitutional Amendment Act, 2015
• Ganga Waters Treaty: The Ganga Waters Treaty is the 1996 India-Bangladesh agreement on sharing the Ganga's waters at Farakka, signed by Prime Ministers H. D. Deve Gowda and Sheikh Hasina on 12 December 1996. It fixed a 30-year formula for dividing dry-season flows, replacing ad hoc memoranda and removing a major irritant in bilateral ties. Its expiry in 2026 makes renewal a live issue. For UPSC it is the model case of transboundary water sharing with a lower riparian. The treaty's 30-year tenure running out in December 2026, putting renewal on the bilateral agenda.
• Operation Insaniyat: India's 2018 humanitarian operation supplying aid for 300,000 Rohingya refugees in Bangladesh.
• Siliguri Corridor: The Siliguri Corridor is the narrow strip of West Bengal, roughly 22 kilometres wide at its slimmest, that links mainland India with the Northeast, flanked by Nepal, Bhutan and Bangladesh and lying close to China's Chumbi Valley. Often called the Chicken's Neck, it is India's most discussed strategic vulnerability. For UPSC it connects geography with national security, since any disruption here would sever the Northeast from the rest of the country. The 2017 Doklam standoff drew attention to Chinese infrastructure uncomfortably close to the corridor.
• LDC graduation: Bangladesh's 2026 exit from Least Developed Country status, which will reduce its trade preferences and raise the stakes for a CEPA with India.
• Muhammad Yunus: Muhammad Yunus is the Bangladeshi economist and Nobel Peace Prize laureate of 2006 who pioneered microcredit through the Grameen Bank, lending to the rural poor without collateral. In August 2024, after the fall of Sheikh Hasina's government, he became the chief adviser heading Bangladesh's interim government. For UPSC, Yunus bridges economy prelims on microfinance and current-affairs mains on India-Bangladesh relations and democratic transitions in the neighborhood. Nobel Peace Prize (2006), shared with the Grameen Bank
• Tarique Rahman: Tarique Rahman is a Bangladeshi politician and the acting chairman of the Bangladesh Nationalist Party (BNP), the son of former president Ziaur Rahman and former prime minister Khaleda Zia. He lived in exile in London from 2008 and returned to Bangladesh in December 2025 after the fall of the Hasina government. For UPSC, he matters for India-Bangladesh relations and questions on neighbourhood political transitions. Bangladesh Nationalist Party (BNP, the party he leads)
• Sheikh Hasina: Sheikh Hasina is the former Prime Minister of Bangladesh and long-time leader of the Awami League, daughter of Sheikh Mujibur Rahman, who governed from 1996-2001 and continuously from 2009 until August 2024. Her tenure combined rapid economic growth with centralisation of power and contested elections. For UPSC, she matters for mains answers on India-Bangladesh ties, regional connectivity, and democratic backsliding in South Asia. resigned as Bangladesh's Prime Minister on 5 August 2024
• Awami League: The Awami League is the Bangladeshi political party founded on 23 June 1949 as the East Pakistan Awami Muslim League (the word Muslim was dropped in 1955) by leaders including Bhashani, Suhrawardy, and Sheikh Mujibur Rahman. Under Mujib it championed Bengali autonomy through the Six-Point Movement, swept the 1970 Pakistani elections, and led the 1971 Liberation War. For UPSC, it is essential to India-Bangladesh relations and the politics of the neighbourhood. Its 1966 Six-Point Movement demanding provincial autonomy became the charter of Bengali nationalism and the prelude to the Liberation War.

Practice questions