India–Pakistan Relations

Introduction and Strategic Significance

Few bilateral relationships in the world are as intractable as the one between India and Pakistan. Born together from the Partition of 1947, the two states have moved from a clash of national identities to territorial disputes and, since 1998, to a nuclear rivalry.

A well-known observation captures the paradox: while nearly 95 per cent of the world’s most serious disputes are ultimately resolvable, the India–Pakistan conflict falls within the irresoluble five per cent.

The relationship has moved in a recurring cycle — beginning with optimism and fanfare, followed by a terror attack or ceasefire violation, the collapse of dialogue, a phase of mutual allegation, and eventually a fresh round of talks that repeats the pattern. Understanding why this cycle persists, and what it would take to break it, is the analytical heart of the topic.

Why the relationship matters for India

• Territorial and sovereignty stakes: The unresolved status of Jammu & Kashmir, the Line of Control (LoC), Siachen and Sir Creek directly involve India’s territorial integrity.
• National security: State-sponsored cross-border terrorism imposes a continuous security and economic cost and shapes India’s defence posture.
• Nuclear stability: Two nuclear-armed neighbours with a history of four-armed conflicts make South Asia a globally watched flashpoint for escalation.
• Regional integration: Hostility has paralysed SAARC and made South Asia one of the least economically integrated regions in the world, capping India’s neighbourhood ambitions.
• Great-power geopolitics: Pakistan’s alignment with China (and historically the United States) links the bilateral rivalry to India’s wider strategic environment, including the risk of a two-front challenge.

Core geostrategic issues at a glance Kashmir — the central dispute around which all others revolve;  Water — the Indus river system and the Treaty governing it;  Siachen — the world’s highest militarised zone. To these are added cross-border terrorism, the nuclear overhang, Sir Creek and the China–Pakistan axis.

Historical Background: A Diplomatic Journey

The rivalry began the moment the two states came into being. Its evolution can be understood in broad phases, each shaped by the interplay of domestic politics, the Kashmir question and the rivalry of external powers.

The Cold War decades (1947–1989)

• 1950s — Militarisation of Pakistan: The early deaths of Jinnah and Liaquat Ali Khan allowed the army to entrench itself. Seeking a Western security guarantee against India, Pakistan joined the Western alliance system (CENTO and SEATO) and built a semi-alliance with the United States.
• 1960 — Indus Waters Treaty: With the United States present in the region and the World Bank acting as a non-political mediator, the two sides concluded a durable water-sharing arrangement — a rare success amid the hostility.
• 1965 — Second war: Encouraged by India’s 1962 setback against China, Pakistan instigated unrest in Kashmir, leading to war. It ended in a military stalemate and the Soviet-brokered Tashkent Declaration (1966), restoring the status quo.
• 1971 — Liberation of Bangladesh: A political crisis in East Pakistan, the crackdown on the Awami League and a massive refugee influx into India culminated in war. India’s decisive intervention (with covert support to the Mukti Bahini) sliced East Pakistan away to create Bangladesh, taking around 90,000 prisoners of war — a foundational trauma in Pakistan’s strategic memory.
• 1972 — Simla Agreement: Pakistan recognised the reality of Bangladesh; the ceasefire line was renamed the Line of Control (LoC); and both sides agreed to settle disputes bilaterally without third-party intervention — converting Kashmir, on paper, from an international to a bilateral question.
• 1980s — Nuclearisation and proxy roots: The Soviet invasion of Afghanistan (1979) and the US–Pakistan mujahideen campaign gave Pakistan’s intelligence establishment both the template and the confidence to later export insurgency to Kashmir. Tensions peaked in the Operation Brasstacks crisis (1986–87).

Post–Cold War to the nuclear tests (1989–1999)

• 1989 onwards — Proxy war in Kashmir: As Western support waned, Pakistan’s ISI launched a large-scale insurgency in the Kashmir valley, exploiting local alienation after the disputed 1987 elections.
• 1998 — Overt nuclearisation: Both countries tested nuclear weapons, adding a new and combustible dimension to the rivalry.
• 1999 — Lahore and Kargil: Prime Minister Vajpayee’s Lahore bus diplomacy and his landmark statement at Minar-e-Pakistan endorsing a stable Pakistan were abruptly undercut when the Pakistan army intruded across the LoC at Kargil, provoking the fourth war. India’s calibrated response — including the air campaign — evicted the intruders while deliberately not crossing the LoC to retain international legitimacy.

The twenty-first century (2001–present)

• 2001–02 — Parliament attack and Operation Parakram: The attack on the Indian Parliament triggered a massive military mobilisation and coercive diplomacy, though no cross-border strike followed.
• 2003 — Ceasefire and dialogue: A formal LoC ceasefire and the composite dialogue under Vajpayee and later Manmohan Singh produced back-channel progress and confidence-building measures such as the Srinagar–Muzaffarabad bus service.
• 2008 — 26/11 Mumbai attacks: The Lashkar-e-Taiba assault on Mumbai halted the peace process and became a defining marker of Pakistan-based terrorism.
• 2014–2016 — Modi’s outreach and its collapse: An invitation to the swearing-in and a surprise visit to Lahore were followed by the Pathankot, Pampore and Uri attacks and the 2016 surgical strikes across the LoC — the first such acknowledged action since 1971.
• 2019 onwards — A harder posture: The Pulwama attack, the Balakot airstrike, the constitutional reorganisation of Jammu & Kashmir, and finally the 2025 Pahalgam attack and Operation Sindoor mark a decisive shift from strategic restraint to direct, visible retaliation

The recurring cycle of India–Pakistan engagement

The Kashmir Dispute: Core of the Conflict

Kashmir is the axis of the rivalry. It is widely held that until the Kashmir question is settled, the relationship will not normalise. The dispute is simultaneously territorial, ideological and deeply tied to the domestic politics and identity of both states.

Origins of the dispute

• A princely state’s dilemma: At Partition, the Muslim-majority princely state of Jammu & Kashmir was ruled by a Hindu monarch, Maharaja Hari Singh, who initially chose to remain independent.
• The tribal invasion: Pakistan sent tribesmen disguised as raiders to seize the state by force. A panicked Hari Singh sought Indian help.
• Accession to India: India agreed to assist only upon accession. Hari Singh signed the Instrument of Accession, Indian troops landed, but by then roughly one-third of the state had fallen to the invaders — territory that became Pakistan-occupied Kashmir (PoK).
• The United Nations and the ceasefire line: On Mountbatten’s advice, India referred the matter to the UN in 1948. A ceasefire took effect on 1 January 1949 (Karachi Agreement), creating a ceasefire line. The UN’s plebiscite proposal was conditioned on Pakistani troop withdrawal, which never happened; India, in turn, did not proceed with a plebiscite.

How the dispute hardened

• Simla Agreement (1972): The ceasefire line became the LoC and the dispute was formally made bilateral. Critics argue India missed the chance to convert the LoC into a permanent international border.
• The insurgency (1989–1996): Exploiting alienation after the disputed 1987 elections, Pakistan’s ISI armed and trained militant groups — the JKLF, Hizbul Mujahideen and later Lashkar-e-Taiba — triggering the exodus of Kashmiri Pandits and a prolonged insurgency, countered by India through operations such as Operation Chanakya.
• Radicalisation: The traditionally syncretic, Sufi-oriented Kashmiri society was targeted by a campaign to spread a far more orthodox interpretation of Islam (Ahl-i-Hadith / Wahhabi), used as an ideological tool to sustain militancy.
• Cycles of unrest: The Amarnath land row (2008), the killing of Burhan Wani (2016) and recurring stone-pelting agitations show how local grievances — unemployment, alienation, heavy-handed security responses — are repeatedly exploited from across the border.

A structural insight The unrest in Kashmir has two intertwined causes: a genuine domestic dimension (alienation, governance and employment deficits) and an external dimension (Pakistan-sponsored militancy and radicalisation). A durable solution requires addressing both — political and developmental engagement at home, alongside firm counter-terrorism at the border.

The 2019 constitutional change

On 5 August 2019, the special status of Jammu & Kashmir was abrogated and the region was reorganised into two Union Territories — Jammu & Kashmir, and Ladakh. India frames this as a full internal, sovereign matter; Pakistan sought unsuccessfully to internationalise it. This move fundamentally reset the political framework within which the Kashmir question is now managed.

Wars and Major Military Conflicts

India and Pakistan have fought four wars and several limited engagements. Notably, the pattern reflects Pakistan behaving as a revisionist power seeking to alter the territorial status quo, and India responding as a status-quo power.

Year	Conflict	Outcome and significance
1947–48	First Kashmir War	Followed the tribal invasion; ended with the UN ceasefire line. Left one-third of the state under Pakistani control (PoK).
1965	Second Kashmir War	Triggered by Pakistani infiltration (Operation Gibraltar). Military stalemate; resolved by the Soviet-brokered Tashkent Declaration.
1971	Bangladesh Liberation War	India’s decisive victory created Bangladesh; ~90,000 PoWs taken. Led to the Simla Agreement (1972).
1999	Kargil War	Pakistani intrusion across the LoC; India evicted the intruders without crossing the LoC. First conflict under the nuclear shadow.

Three of these wars were fought over Kashmir; 1971 was over the secession of East Pakistan. Beyond full wars, the relationship has seen the 2016 surgical strikes, the 2019 Balakot airstrike, and Operation Sindoor (2025).

The Nuclear Dimension and Deterrence Theory

Both states tested nuclear weapons in 1998, though their programmes date to the 1970s. India’s drive followed the 1964 Chinese test and manifested in the 1974 Peaceful Nuclear Explosion; Pakistan’s was a direct response to its 1971 defeat and India’s conventional superiority. Understanding the strategic logic is essential for the analytical answer.

Two competing theories

School	Optimist view	Pessimist view
Associated with	Sumit Ganguly (drawing on Schelling and Waltz)	S. Paul Kapur
Core claim	Mutual vulnerability breeds caution; leaders value survival and avoid escalation, so nuclear weapons prevent full-scale war and bring stability.	Nuclear weapons can incentivise a dissatisfied, weaker, revisionist state to provoke, since it is insulated from full retaliation and can invite favourable international intervention.
Applied to South Asia	Deterrence prevented Kargil and later crises from escalating into total war.	The nuclear umbrella emboldened Pakistan’s proxy war — sub-conventional aggression under a nuclear shield.

The stability–instability paradox

This is the key theoretical concept for the topic. When two states both possess nuclear weapons, the probability of an all-out (direct) war falls sharply, but the probability of minor or indirect conflicts rises. Pakistan deliberately exploits this paradox: nuclear deterrence at the top of the escalation ladder gives it space to wage low-intensity, proxy conflict at the bottom.

The heart of the matter It is not merely Pakistan’s nuclear capability that deters India, but the ambiguity around its use. This ambiguity provides a shield for risk-seeking behaviour — supporting terrorism and proxies while betting that international pressure will restrain an Indian conventional response. In this reading, nuclear weapons, conventional forces and militant proxies form a single, integrated grand strategy.

India maintains a declared No First Use (NFU) posture; Pakistan rejects NFU and cultivates deliberate ambiguity, favouring the stability–instability paradox. India’s response has explored limited-war concepts (the Cold Start doctrine) designed to punish provocation without crossing Pakistan’s nuclear threshold.

Cross-Border Terrorism as State Strategy

Pakistan’s use of non-state actors is not incidental; it is a calculated instrument of asymmetric warfare designed to compensate for conventional inferiority and to keep the Kashmir question alive without risking open war.

Anatomy of the strategy

• Asymmetric balancing: Terrorism is used to destabilise Kashmir at low cost. Launch pads across the LoC in PoK are used to infiltrate militants into India.
• The infiltration cycle: A recurring seasonal tactic — ceasefire violations and shelling from around September divert Indian forces, allowing infiltration before the winter snows, followed by guerrilla activity. This diversionary method traces back to the 1947 tribal invasion.
• Deniability and proxies: Groups such as Lashkar-e-Taiba (LeT) and Jaish-e-Mohammed (JeM) provide plausible deniability while advancing state objectives; more recent fronts have also emerged.
• Radicalisation as a tool: Ideological indoctrination is used to recruit and sustain militancy, exploiting local alienation.

Major terror incidents

Incident	Significance
2001 — Parliament attack	LeT/JeM assault on the Indian Parliament; triggered Operation Parakram.
2008 — 26/11 Mumbai	LeT assault on Mumbai; a watershed that halted the peace process and galvanised global attention on Pakistan-based terror.
2016 — Uri	Attack on an army camp; prompted India’s cross-LoC surgical strikes.
2019 — Pulwama	Suicide bombing of a CRPF convoy; India withdrew Most Favoured Nation (MFN) status and launched the Balakot airstrike.
2025 — Pahalgam	Killing of 26 civilians (mainly tourists); triggered the suspension of the Indus Waters Treaty and Operation Sindoor.

Areas and Attempts at Cooperation

Despite the hostility, there is a substantial reservoir of shared interest and a long record of engagement — the raw material from which any future normalisation must be built.

Economic and trade potential

• Untapped complementarity: The two economies together account for the overwhelming share of the region’s GDP, and studies suggest that peace could multiply bilateral trade several times over. India can competitively export goods that Pakistan currently imports indirectly through third countries such as Dubai.
• The cost of hostility: South Asia remains one of the least integrated regions on earth — sometimes described as a case of ‘inverse regionalism’ — held back by protectionism, weak trade facilitation, lack of transit and mutual suspicion.

Water cooperation: the Indus Waters Treaty

The Indus Waters Treaty of 1960 stands as the single most durable instance of cooperation — surviving multiple wars for over six decades until its recent suspension. It demonstrates that institutionalised, technically grounded cooperation is possible even between adversaries.

Dialogue frameworks and confidence-building

• The composite dialogue: A structured mechanism covering all issues — from Kashmir and Siachen to Sir Creek, water and travel — pursued under successive governments.
• Confidence-building measures (CBMs): Bus and rail links (the Srinagar–Muzaffarabad service, the Samjhauta Express), the Lahore process, back-channel diplomacy, agreements to reduce nuclear risk, and hotlines between military operations directorates.
• People-to-people and cultural ties: Shared language, cuisine, music, sport and cinema create genuine affinity; cricket diplomacy and social media have periodically built connections, even if these have not yet matured into durable cross-border links.

Why cooperation keeps failing Every promising opening — Tashkent, Simla, Lahore, the composite dialogue, Modi’s Lahore visit — has been derailed by a terror attack or ceasefire violation. The structural obstacle is the primacy of the Pakistan army in its India policy, and the persistence of terrorism as state strategy. Hence India’s consistent position: talks and terror cannot proceed together.

Key Issues and Challenges

The following disputes and pressures define the contemporary agenda. Kashmir (Section 3) is the overarching one; the rest are examined here.

Siachen Glacier

• The problem: The 1949 ceasefire line was never demarcated beyond map point NJ9842, leaving the glacier undefined. In 1984, pre-empting a Pakistani move, India secured the heights under Operation Meghdoot.
• Strategic value: Control checks China–Pakistan collusion in the Karakoram region; India therefore favours the status quo. The human cost is severe, with most casualties caused by the extreme weather rather than combat. The two sides came close to agreement in 1989, 1992 and 2006 but could not conclude it.

Sir Creek

• The dispute: A 96-km stretch of marshland separating Gujarat (Kutch) from Pakistan’s Sindh. The disagreement is over the maritime boundary — India argues the boundary lies mid-channel (per a 1925 map and mid-channel pillars), while Pakistan claims the entire creek.
• Why it matters: The dispute affects the delimitation of the maritime boundary and each side’s exclusive economic zone, giving it economic as well as territorial weight.

The China–Pakistan axis

• All-weather friendship: China’s deep partnership with Pakistan raises the prospect of a two-front challenge for India, brought into sharp relief by the border tensions in Ladakh.
• CPEC and sovereignty: The China–Pakistan Economic Corridor, part of the Belt and Road Initiative, runs through Pakistan-occupied Kashmir, which India holds to be a violation of its sovereignty. Combined with the Gwadar port, it is seen as a strategy of strategic encirclement.
• Diplomatic friction: China has repeatedly shielded Pakistan-based terrorists at the UN Security Council, complicating India’s diplomatic efforts.

Gilgit-Baltistan

Pakistan’s move to grant provincial status to Gilgit-Baltistan — part of the erstwhile princely state of Jammu & Kashmir — is rejected by India as an illegal attempt to alter the status of occupied territory.

Trade and economic breakdown

Trade has repeatedly been a casualty of conflict: India withdrew MFN status after Pulwama (2019), and trade was suspended again during subsequent crises. Pakistan never extended full MFN treatment to India. The result is a near-total collapse of formal bilateral commerce, foreclosing the economic interdependence that might otherwise create stakes in peace.

The Indus Waters Treaty — cooperation under strain

Water is a first-order strategic issue; some analysts warn that future conflicts in Asia could be driven by water itself. The Indus Waters Treaty (IWT) has governed the sharing of the Indus system since 1960 and is now at the centre of the contemporary crisis.

Structure of the Treaty

• Signed in 1960 between Nehru and Ayub Khan, mediated by the World Bank as a non-political signatory — uniquely negotiated by engineers rather than diplomats.
• Allocation: India received the three eastern rivers (Ravi, Beas, Sutlej); Pakistan the three western rivers (Indus, Jhelum, Chenab). India may use the western rivers for non-consumptive purposes such as run-of-the-river hydropower, with limited storage.
• Dispute resolution: A graded mechanism through the Permanent Indus Commission — bilateral talks first, then a Neutral Expert, and finally a Court of Arbitration. Modification requires mutual agreement.

Recurring project disputes

• Salal (1978), Baglihar (verdict 2011) and the Tulbul/Wullar barrage were all contested by Pakistan under the Treaty.
• Kishanganga: Pakistan challenged this hydro project on a tributary of the Jhelum; the Court of Arbitration (2013) permitted India to proceed subject to maintaining a minimum downstream flow.
• Ratle: The dispute over the Ratle project on the Chenab exposed a procedural clash — India sought a Neutral Expert while Pakistan sought a Court of Arbitration, and the World Bank controversially set both processes in motion.

The 2025 suspension

Indus Waters Treaty held ‘in abeyance’ (2025) Following the Pahalgam terror attack, India placed the Treaty in abeyance in April 2025, declaring it would remain so until Pakistan credibly and irrevocably ends its support for cross-border terrorism — captured in the message that ‘blood and water cannot flow together’. Legal complexity: the Treaty has no provision for unilateral withdrawal, and Article XII requires mutual agreement to terminate; Pakistan may approach international forums. Strategic leverage: India could exercise greater control over flows on the western rivers, though its ability to actually withhold water is constrained by limited storage and run-of-the-river infrastructure — making this, for now, more a diplomatic signal than an immediate hydrological weapon. Wider implications: the move sets a precedent that could affect India’s own position as a lower riparian vis-à-vis China, and its water relations with Bangladesh and Nepal.

The Organisation of Islamic Cooperation (OIC)

The 57-member OIC has often echoed Pakistan’s narrative on Jammu & Kashmir, which India rejects as interference in its internal affairs.

Yet India has successfully deepened bilateral ties with key members such as Saudi Arabia and the UAE — demonstrating an ability to manage the relationship even amid multilateral criticism.

Recent Developments (2019–2026)

The most recent phase marks a decisive shift in India’s posture — from strategic restraint to a declared doctrine of visible, forceful retaliation against terrorism treated as state policy.

Event	What happened and why it matters
Pulwama & Balakot (2019)	A suicide bombing killed CRPF personnel; India revoked MFN status and struck a terror camp at Balakot inside Pakistan — the first air action across the international border in decades.
Article 370 (Aug 2019)	Jammu & Kashmir’s special status was abrogated and the region reorganised into two Union Territories, resetting the internal framework of the Kashmir question.
Pahalgam attack (22 Apr 2025)	Militants killed 26 civilians, mostly tourists, near Pahalgam; the attack was linked to The Resistance Front, an offshoot of Lashkar-e-Taiba.
IWT abeyance (Apr 2025)	India held the Indus Waters Treaty in abeyance; Pakistan responded by holding the Simla Agreement in abeyance and calling the water move an ‘act of war’.
Operation Sindoor (7 May 2025)	Precision air and missile strikes hit nine terror-linked sites in Pakistan and PoK in about 23 minutes, from within Indian territory — the first strike across the international boundary since 1971.
Ceasefire (May 2025)	After a short, sharp escalation, an understanding to halt firing took effect, though the underlying instability and risk of future escalation persist.

Operation Sindoor and the new doctrine

• Tri-service, precision, non-escalatory: A joint effort of the Army, Navy and Air Force, described officially as ‘focused, calibrated and non-escalatory’, deliberately avoiding Pakistani military facilities and limiting civilian damage.
• Targets: Nine sites linked to JeM and LeT across Pakistan and PoK, aimed at dismantling terror infrastructure.
• Advanced weaponry: SCALP cruise missiles, HAMMER precision munitions, loitering (‘kamikaze’) drones, the METEOR beyond-visual-range air-to-air missile and the BRAHMOS supersonic cruise missile, backed by a layered air-defence system including S-400 and Akash.
• Strategic message — a new red line: If terrorism is used as state policy, it will be met with a visible and forceful response. This marks a shift from deterrence-by-denial to direct action.

A Multidimensional Analysis

For a rounded answer, the relationship can be assessed across several dimensions, each with its own logic and interlinkages.

Dimension	Key features and interlinkages
Political / Diplomatic	Kashmir at the core; the collapse of SAARC (no summit since 2014); India’s success in de-hyphenating the relationship and isolating Pakistan diplomatically after major attacks.
Strategic / Security	Nuclear deterrence and the stability–instability paradox; cross-border terrorism; the two-front challenge posed by the China–Pakistan axis and CPEC through PoK.
Economic	Near-total breakdown of formal trade despite large untapped complementarity; the opportunity cost of ‘inverse regionalism’; Pakistan’s own economic fragility, which deepens its dependence on China.
Water / Environmental	The Indus system as both a durable cooperative institution and a new pressure point after the 2025 abeyance; climate stress raising the future stakes.
Cultural / People-to-people	Deep shared heritage, language and sport that generate genuine affinity, repeatedly disrupted by security shocks and visa restrictions.
Diaspora	Large South Asian diasporas that shape perceptions abroad and can either amplify hostility or, potentially, support Track-II bridge-building.

Pakistan’s economic crisis — implications for India Economic instability could push Pakistan further into China’s strategic orbit; historically, external aid has emboldened anti-India activity. Yet China, to protect its CPEC investments, has an interest in regional stability that may restrain Pakistan. The net effect is uncertain, requiring India to monitor spillovers and engage Pakistan’s external donors proactively.

Way Forward

A realistic path forward combines firmness on security with the patient construction of stakes in peace. The following measures capture the mainstream policy consensus.

1. Zero tolerance for cross-border terrorism: National security cannot be compromised; verifiable, irreversible action against terror groups operating from across the border is the precondition for meaningful engagement — ‘talks and terror cannot go together’.
2. Sustained, structured dialogue: Once the security floor is met, regular and meaningful talks on the full basket of issues — Kashmir, Siachen, Sir Creek, water and trade — reduce miscalculation.
3. Nuclear risk reduction: Strengthen crisis-management channels, military hotlines and confidence-building measures to lower the risk of inadvertent escalation between two nuclear neighbours.
4. Economic engagement where feasible: Building trade and commercial stakes creates constituencies for peace, though this must follow, not precede, progress on terrorism.
5. Address the domestic dimension in Kashmir: Job creation, political participation, good governance and the reintegration of alienated youth reduce the space that hostile actors exploit.
6. Cooperative water management: Long-term water security in South Asia depends on cooperative, science-based basin management rather than unilateral action — a principle India itself benefits from as a riparian state.
7. Cultural and people-to-people bridges: Sport, culture and easier travel can generate goodwill and keep channels open even when official ties are frozen.

Conclusion

The India–Pakistan relationship remains locked in a cycle rooted in the unfinished business of Partition, the Kashmir dispute and the primacy of Pakistan’s military in its India policy. Nuclear weapons have made large-scale war improbable but have simultaneously enabled a persistent proxy conflict beneath the nuclear threshold.

The contemporary phase — the reorganisation of Jammu & Kashmir, the suspension of the Indus Waters Treaty and Operation Sindoor — signals a clear shift from restraint to a doctrine of visible retaliation, drawing a new red line against terrorism as state policy.

Yet lasting peace cannot be secured by deterrence alone. It requires Pakistan to abandon territorial revisionism and dismantle its terror infrastructure, and India to keep addressing the domestic roots of alienation in Kashmir while keeping the door to dialogue ajar.

Only when firmness on security is matched by a genuine, mutual stake in cooperation can the two neighbours move from managed hostility towards durable stability — a shift that would transform the strategic landscape not only of South Asia but of the wider world.