India-Pakistan Relations: A Complete Overview

India-Pakistan relations are among the most complex and closely watched bilateral relationships in the world. Two neighbours born from the same land, sharing languages, cuisines, music and a long common history, have spent most of their independent existence locked in suspicion, conflict and intermittent attempts at reconciliation. The story begins with the Partition of British India in 1947 and remains tied to the unresolved question of Jammu and Kashmir.

This overview explains the relationship in a balanced, factual way. It covers the origins of the rivalry, the major wars, the Kashmir dispute, the key agreements, the Indus Waters Treaty, terrorism, the nuclear dimension and the human ties that survive despite political distance. Last reviewed: 1 October 2026.

Quick Facts

Origins: The Partition of British India in 1947

The roots of India-Pakistan relations lie in the end of British rule. By the 1940s, the demand of the All-India Muslim League for a separate homeland for Muslims had collided with the Indian National Congress’s vision of a united, secular India. Negotiations failed to produce a federal compromise, and the British government announced that power would be transferred by June 1948. Lord Mountbatten, the last Viceroy, advanced the date, and independence came in August 1947.

The Radcliffe Line

The provinces of Punjab and Bengal were divided on religious-majority lines by a boundary commission chaired by Sir Cyril Radcliffe. The award was announced only after independence, leaving millions uncertain which country they lived in. The resulting border, known as the Radcliffe Line, remains the basis of much of the international boundary today.

Migration and violence

Partition triggered one of the largest forced migrations in human history. Estimates suggest that around 10 to 15 million people crossed the new borders, and historians believe that hundreds of thousands, with some estimates running far higher, died in communal violence. Families were separated, homes and property were lost, and the trauma entered the collective memory of both nations. Disputes over the division of assets, the armed forces, refugee property and river waters began almost immediately and coloured the first decade of the relationship.

Jammu and Kashmir: Accession and the First Kashmir War

Under the Indian Independence Act of 1947, the 560-odd princely states were free to accede to either dominion, guided by geography and the wishes of their people. Jammu and Kashmir, a large Muslim-majority state ruled by a Hindu Maharaja, Hari Singh, initially chose neither. In October 1947, tribal fighters from the north-west frontier entered the state, and Pakistan has been described by many accounts as supporting the incursion. The Maharaja sought military help from India and signed the Instrument of Accession on 26 October 1947. Indian troops were airlifted to Srinagar the next day.

The war and the United Nations

Fighting continued through 1948, and India referred the matter to the United Nations Security Council in January 1948. The Council established the United Nations Commission for India and Pakistan and passed resolutions calling for a ceasefire and a mechanism to ascertain the wishes of the people. A ceasefire took effect on 1 January 1949, and the Karachi Agreement of July 1949 set out a ceasefire line, monitored by the UN Military Observer Group in India and Pakistan (UNMOGIP). The territory ended up divided: India administers Jammu, the Kashmir Valley and Ladakh, while Pakistan administers what it calls Azad Jammu and Kashmir and Gilgit-Baltistan.

The Wars Between India and Pakistan

The two countries have fought three full-scale wars and one limited conflict. Each left a distinct mark on the relationship and on the region.

The 1965 war

The 1965 war lasted about three weeks and ended in a stalemate, with both sides claiming success. It ended through international pressure and Soviet mediation.

The 1971 war and Bangladesh

The 1971 war grew out of the political crisis in East Pakistan, where a movement for autonomy and the subsequent military crackdown sent millions of refugees into India. After a short war, Pakistani forces in the east surrendered, and Bangladesh emerged as an independent country. Roughly 90,000 Pakistani prisoners of war were held by India, an issue addressed in the Simla Agreement.

Kargil, 1999

The Kargil conflict took place only months after the Lahore Declaration. Both countries were by then nuclear-armed, and the episode was watched worldwide for signs of escalation. India restricted its military operations to its own side of the Line of Control.

The Kashmir Dispute and the Line of Control

Kashmir is the central, longest-running issue in India-Pakistan relations. The two countries hold different positions, and each regards its position as legally and morally grounded.

• India’s position: the Maharaja’s accession of 1947 was legal and complete, and Jammu and Kashmir is an integral part of India. India also points to the Simla Agreement as committing both sides to settle differences bilaterally and says that Pakistan-administered territory is under occupation.
• Pakistan’s position: the status of Kashmir remains unresolved and should be settled according to the wishes of its people, in line with early UN Security Council resolutions that mentioned a plebiscite. Pakistan has also supported raising the issue at international forums.

The Line of Control

The ceasefire line of 1949 was redefined after the 1971 war and became known as the Line of Control (LoC) following the Simla Agreement of 1972. It runs for roughly 740 km and is not a recognised international border. North of its end point lies the Siachen Glacier, where both armies have been deployed since 1984 in one of the highest and harshest battlefields on Earth. A separate stretch, the Working Boundary, lies further south between Jammu and Pakistan’s Punjab province.

Why Kashmir endures

Kashmir matters because it touches national identity, territory, water resources, strategic geography and the legacy of Partition. Neither government has found a formula that is domestically acceptable and mutually agreeable, so the issue has stayed open for over seven decades.

Key Agreements and Peace Efforts

Alongside conflict, India and Pakistan have signed numerous agreements and held repeated rounds of talks. Several deserve particular attention.

The Tashkent Agreement (1966)

Signed on 10 January 1966 in Tashkent, then in the Soviet Union, the declaration was brokered by Soviet Premier Alexei Kosygin and signed by Prime Minister Lal Bahadur Shastri and President Ayub Khan. Both sides agreed to withdraw to the positions held before August 1965 and to restore diplomatic relations. Shastri died in Tashkent soon after signing.

The Simla Agreement (1972)

Signed on 2 July 1972 by Prime Minister Indira Gandhi and Zulfikar Ali Bhutto, the Simla Agreement is the foundation of the modern bilateral framework. It committed both countries to resolve differences through bilateral negotiations, respect the Line of Control arising from the December 1971 ceasefire, and work towards normalisation, including the return of prisoners of war.

The Lahore Declaration (1999)

In February 1999, Prime Minister Atal Bihari Vajpayee travelled to Lahore by bus and signed a declaration with Prime Minister Nawaz Sharif. It reaffirmed the Simla Agreement and committed both countries to confidence-building measures on nuclear risk reduction. Its promise was overshadowed by the Kargil conflict a few months later.

The Agra Summit (2001) and composite dialogue

The Agra Summit of July 2001 between Vajpayee and General Pervez Musharraf ended without a joint statement, despite high expectations. A structured Composite Dialogue process, which covered Kashmir, trade, water, terrorism and other issues, was begun in the late 1990s and revived in 2004, achieving incremental progress before being paused after the 2008 Mumbai attacks.

The Indus Waters Treaty: A Rare Durable Agreement

The Indus Waters Treaty of 19 September 1960 is often described as one of the most durable agreements between the two countries. Negotiated over nearly a decade with the good offices of the World Bank, it was signed in Karachi by Prime Minister Jawaharlal Nehru and President Ayub Khan, with the World Bank as a signatory for limited purposes.

How the treaty divides the rivers

• The three eastern rivers, the Ravi, Beas and Sutlej, were allocated to India for unrestricted use.
• The three western rivers, the Indus, Jhelum and Chenab, were allocated mainly to Pakistan, with India permitted limited uses such as run-of-the-river hydropower and restricted irrigation.
• A Permanent Indus Commission, with a commissioner from each country, meets and exchanges data, and the treaty includes a graded dispute-resolution mechanism.

Why it matters

The treaty survived the wars of 1965 and 1971 and the Kargil conflict. That resilience is frequently cited as an example of how technical cooperation can continue even during political hostility. Disagreements over the design of hydropower projects on the western rivers have nonetheless led to disputes over interpretation, and water remains a sensitive subject for both nations.

Terrorism as a Core Issue

From India’s perspective, terrorism emanating from Pakistan-based groups is the central obstacle to normal relations. Pakistan rejects the charge of state involvement and says it has itself suffered heavily from terrorism. Both positions shape the dialogue, and the subject has repeatedly derailed peace efforts.

Major attacks

• 13 December 2001: an attack on the Indian Parliament in New Delhi, followed by a prolonged military standoff along the border.
• 26 November 2008: the Mumbai attacks, known as 26/11, in which gunmen attacked multiple locations over about three days. India linked the attackers to the Lashkar-e-Taiba, a Pakistan-based group.
• January 2016: an attack on the Pathankot air force base.
• September 2016: an attack on an army camp at Uri in Jammu and Kashmir.
• 14 February 2019: the Pulwama attack on a security convoy, claimed by the Jaish-e-Mohammed.

India’s responses

After the Uri attack, India announced surgical strikes across the Line of Control on 29 September 2016 against what it described as terrorist launch pads. After Pulwama, the Indian Air Force carried out an airstrike at Balakot in Pakistan’s Khyber Pakhtunkhwa province on 26 February 2019. Pakistan disputed the Indian account of the damage, and an aerial engagement followed the next day. These episodes marked a shift in India’s declared willingness to respond across the border.

The Nuclear Dimension

Both countries possess nuclear weapons, which makes any crisis between them a matter of global concern. India conducted its first test in 1974, described as a peaceful nuclear explosion, and carried out the Pokhran-II tests in May 1998. Pakistan responded with its own tests at Chagai in late May 1998. Neither country is a party to the Nuclear Non-Proliferation Treaty.

Stability and instability

Strategic analysts often refer to the stability-instability paradox: the mutual fear of nuclear escalation may discourage full-scale war, while also allowing lower-level conflict, such as proxy violence or limited border clashes, to continue below the nuclear threshold. The Kargil conflict is frequently cited as an example.

Confidence-building measures

• The 1988 agreement on non-attack of nuclear facilities, under which both countries exchange lists of such facilities on 1 January each year.
• A pre-notification agreement on ballistic missile tests, signed in 2005.
• Military hotlines between the Directors General of Military Operations.
• A 1991 agreement on advance notice of military exercises and the prevention of airspace violations.

Cycles of Tension and Thaw: Trade, Diplomacy and Downgrades

The relationship moves in cycles. Periods of dialogue, such as the late 1990s and the mid-2000s, have been followed by crises that freeze contacts. Typical responses to a crisis have included calling back high commissioners, reducing embassy staff, closing the airspace, curtailing visas and suspending transport links.

Trade

Formal trade has remained far below its potential, although the two economies are adjacent. Pakistan granted India Most Favoured Nation treatment in principle through the 1990s and 2000s, but never fully implemented it. Trade was suspended by Pakistan in August 2019 after the changes to the constitutional status of Jammu and Kashmir, and Pakistan also reduced diplomatic ties at that time. Informal and third-country trade has continued in various forms.

Cricket and other diplomacy

Cricket has been a recurring tool of goodwill. The 1987 and 2004 tours, and the leaders watching matches together, are remembered as thaw moments. Today the two teams largely meet only in multi-nation tournaments, since bilateral series have been suspended for many years.

People-to-People Ties and Shared Culture

Politics has never fully severed the human bonds. Millions of families have relatives on the other side of the border, and the memory of a shared homeland remains vivid in Punjab, Sindh, Bengal, Delhi and Uttar Pradesh.

• Transport links: the Samjhauta Express, which began operating in 1976, the Thar Express, the Delhi-Lahore bus service launched in 1999 and the Srinagar-Muzaffarabad bus service of 2005 allowed families to meet, although services have been suspended at different times.
• Religious travel: under a 1974 protocol, pilgrims visit shrines across the border. The Kartarpur Corridor, opened in November 2019, allows Sikh devotees from India to visit Gurdwara Darbar Sahib in Pakistan without a conventional visa.
• Arts and food: Urdu poetry, ghazals, Qawwali, Bollywood films, Punjabi folk music and a shared love of biryani and kebabs travel easily across the border.
• Divided families: visa restrictions have made reunions hard, and the issue of fishermen and civilians held in each other’s prisons is periodically addressed through humanitarian exchanges of lists, carried out on 1 January and 1 July under a 2008 agreement.

The Current State of Frozen Relations

At present, India-Pakistan relations remain largely frozen. There is no structured composite dialogue, trade is minimal, travel is restricted, and diplomatic representation is at a reduced level. Communication continues through limited channels, including the military hotlines, the annual exchange of lists, and the Indus water commissioners.

Positions on talks

India has maintained that talks and terrorism cannot go together and that any dialogue must address cross-border terrorism, while it also says that outstanding issues should be resolved bilaterally. Pakistan has called for a dialogue that includes Kashmir and has favoured wider international involvement. These contrasting preconditions have prevented a restart for years.

What could change the picture

• Sustained quiet along the Line of Control, which would improve the climate for talks.
• Back-channel contacts that restore diplomatic representation and visas.
• Limited cooperation on humanitarian, religious and environmental matters.

The history of India and Pakistan is one of shared origins and divergent paths. The Partition of 1947, the unresolved Kashmir question, four conflicts, recurring terror attacks and a nuclear overlay have made the relationship brittle, yet agreements such as the Indus Waters Treaty and the Simla Agreement show that structured cooperation is possible. Ordinary people on both sides continue to value contact, culture and connection. Understanding this history, in its full complexity, is essential for anyone following South Asian affairs.

Frequently Asked Questions

Why are India and Pakistan rivals?

The rivalry stems from the violent Partition of British India in 1947 and the unresolved dispute over Jammu and Kashmir. Competing national narratives, territorial disputes, wars and cross-border terrorism have reinforced mistrust over the decades.

How many wars have India and Pakistan fought?

They have fought three full-scale wars, in 1947-48, 1965 and 1971, and the limited Kargil conflict in 1999. The 1971 war led to the creation of Bangladesh.

What is the Line of Control?

The Line of Control is the de facto boundary dividing the Indian-administered and Pakistan-administered parts of Jammu and Kashmir. It evolved from the 1949 ceasefire line and was named in the Simla Agreement of 1972. It is not recognised as an international border.

What is the Indus Waters Treaty?

It is a 1960 water-sharing agreement brokered by the World Bank. It gives India the eastern rivers (Ravi, Beas, Sutlej) and Pakistan the western rivers (Indus, Jhelum, Chenab), with India allowed limited uses on the western rivers. It has endured through wars and crises.

Are India and Pakistan both nuclear powers?

Yes. India tested nuclear devices in 1974 and 1998, and Pakistan tested in 1998. The two countries have some confidence-building measures, such as the annual exchange of lists of nuclear facilities and missile test pre-notification.

Is there any trade or travel between India and Pakistan today?

Formal trade and travel are very limited. Some religious pilgrimages, humanitarian exchanges and a few channels of official communication continue, but most routine links have been suspended or restricted.

{“@context”:”https://schema.org”,”@graph”:[{“@type”:”FAQPage”,”mainEntity”:[{“@type”:”Question”,”name”:”Why are India and Pakistan rivals?”,”acceptedAnswer”:{“@type”:”Answer”,”text”:”The rivalry stems from the violent Partition of British India in 1947 and the unresolved dispute over Jammu and Kashmir. Competing national narratives, territorial disputes, wars and cross-border terrorism have reinforced mistrust over the decades.”}},{“@type”:”Question”,”name”:”How many wars have India and Pakistan fought?”,”acceptedAnswer”:{“@type”:”Answer”,”text”:”They have fought three full-scale wars, in 1947-48, 1965 and 1971, and the limited Kargil conflict in 1999. The 1971 war led to the creation of Bangladesh.”}},{“@type”:”Question”,”name”:”What is the Line of Control?”,”acceptedAnswer”:{“@type”:”Answer”,”text”:”The Line of Control is the de facto boundary dividing the Indian-administered and Pakistan-administered parts of Jammu and Kashmir. It evolved from the 1949 ceasefire line and was named in the Simla Agreement of 1972. It is not recognised as an international border.”}},{“@type”:”Question”,”name”:”What is the Indus Waters Treaty?”,”acceptedAnswer”:{“@type”:”Answer”,”text”:”It is a 1960 water-sharing agreement brokered by the World Bank. It gives India the eastern rivers (Ravi, Beas, Sutlej) and Pakistan the western rivers (Indus, Jhelum, Chenab), with India allowed limited uses on the western rivers. It has endured through wars and crises.”}},{“@type”:”Question”,”name”:”Are India and Pakistan both nuclear powers?”,”acceptedAnswer”:{“@type”:”Answer”,”text”:”Yes. India tested nuclear devices in 1974 and 1998, and Pakistan tested in 1998. The two countries have some confidence-building measures, such as the annual exchange of lists of nuclear facilities and missile test pre-notification.”}},{“@type”:”Question”,”name”:”Is there any trade or travel between India and Pakistan today?”,”acceptedAnswer”:{“@type”:”Answer”,”text”:”Formal trade and travel are very limited. Some religious pilgrimages, humanitarian exchanges and a few channels of official communication continue, but most routine links have been suspended or restricted.”}}]}]}