The Conquest of Bengal: The Battles of Plassey & Buxar, the Diwani and the Dual Government (1757-1765)
Bengal: the Richest Province
🎯 Exam priority: Important. Tier 2 — recurs regularly in Prelims and Mains; cover fully.
Why this topic matters for UPSC. Plassey (1757) and Buxar (1764) are the two most cited anchor-battles in Modern History — they mark the real beginning of British territorial power, and both dates appear repeatedly.
Plassey gave the British Bengal; Buxar gave them real military supremacy over the Mughal coalition.
The Diwani grant (1765) and the Dual Government system are tested in context.
Mains: assess the significance of these battles for the establishment of British paramountcy.
British rule in India did not begin with a grand invasion — it began in Bengal, the richest province of the Mughal Empire, through trade, intrigue and two decisive battles. Between Plassey (1757) and Buxar (1764), a company of merchants became the master of a kingdom of tens of millions — the true foundation of the British Empire in India.
Bengal: the Richest Province
Bengal (with Bihar and Orissa) was the wealthiest and most fertile province in India — its exports of fine cotton and silk textiles, saltpetre, sugar and indigo were famous across the world. Through the 18th century, able governors — Murshid Quli Khan and then Alivardi Khan — made Bengal virtually independent of the crumbling Mughal centre, keeping strict control over the European companies.
The English East India Company had long enjoyed valuable trade privileges in Bengal (the right, since 1717, to trade duty-free under dastaks). But its servants abused these privileges — trading privately and dodging duties — and fortified Calcutta without permission. The clash between a wealthy province and a grasping company was set.
The Road to Plassey
When the old, watchful Alivardi Khan died, his young and headstrong successor decided to put the English in their place.
The Road to Plassey
In 1756, Siraj-ud-Daulah succeeded his grandfather Alivardi Khan. He rightly saw the English fortification of Calcutta as an attack on his sovereignty and ordered them to stop. When they refused, he marched on Calcutta and captured the Company's Fort William (June 1756), renaming the city Alinagar. To these days belongs the disputed "Black Hole of Calcutta" episode — by J.Z. Holwell's much-doubted account, 146 English prisoners were locked overnight in a tiny room and 123 suffocated; modern historians regard the figures as grossly exaggerated, but the story was used to inflame English opinion against the Nawab.
But Siraj acted with "great energy but undue haste and inadequate preparation". A strong English force under Robert Clive and Admiral Watson sailed up from Madras and reconquered Calcutta (early 1757), the peace being patched up by the Treaty of Alinagar (February 1757). Clive then, instead of fighting fairly, organised a conspiracy against the Nawab — winning over his own commander Mir Jafar, the banker Jagat Seth, and others with promises of the throne and money.
The Battle of Plassey, 1757
The result was less a battle than a betrayal.
The Battle of Plassey, 1757
On 23 June 1757, the two armies met on the field of Plassey, about 20 miles from Murshidabad. It was, in one historian's words, "a battle only in name": the English lost just 29 men, because the bulk of Siraj's army, led by the traitors Mir Jafar and Rai Durlabh, took no part in the fighting. Only a small loyal force resisted. Siraj was forced to flee, and was soon captured and put to death by Mir Jafar's son, Miran.
The English made Mir Jafar the new Nawab — their puppet — and were rewarded richly: Mir Jafar paid the Company about Rs 1.77 crore and granted it vast sums and lands; Clive himself took a fortune. Plassey's real significance was not military but political: it gave the Company control of Bengal's revenues, opening the floodgates of the "drain of wealth" and turning a trading body into a political power.
From Plassey to Buxar: Mir Jafar & Mir Qasim
A puppet who could not pay his masters was soon replaced — and the replacement proved dangerously able.
From Plassey to Buxar: Mir Jafar & Mir Qasim
Mir Jafar could never satisfy the Company's endless demands, so in 1760 the English deposed him and installed his son-in-law, Mir Qasim (who paid them yet more). But Mir Qasim turned out to be the ablest of the Bengal Nawabs: he shifted his capital to Munger (away from English Calcutta), reorganised his finances and modernised his army.
The fatal quarrel was over the abuse of the dastak — the duty-free trade pass — by Company servants for their private trade, which ruined Indian merchants and the Nawab's revenue. When Mir Qasim abolished all internal duties to put Indian and English traders on an equal footing, the English were enraged. War followed; Mir Qasim was defeated, and he fled to form a grand alliance.
The Battle of Buxar, 1764
That alliance produced the battle that really decided who would rule.
The Battle of Buxar, 1764
On 22 October 1764, at Buxar, the British under Major Hector Munro faced the combined armies of three powers — the deposed Mir Qasim, the Nawab of Awadh Shuja-ud-Daula, and the Mughal Emperor Shah Alam II. Though heavily outnumbered (about 17,000 against some 40,000), the British won a decisive victory through superior discipline and artillery.
Buxar mattered far more than Plassey. Plassey had made the English masters of Bengal by intrigue; Buxar made them a great power across northern India by force of arms, defeating the Nawab of Awadh and the Mughal Emperor himself. After Buxar, the Nawab of Bengal was a puppet, Awadh a dependent ally, and the emperor a pensioner.
The Diwani & the Dual Government
The victory was sealed not by annexation but by a clever legal device that let the Company rule while the Nawab took the blame.
The Diwani & the Dual Government
By the Treaty of Allahabad (1765), Robert Clive obtained from Emperor Shah Alam II the Diwani — the right to collect the revenues of Bengal, Bihar and Orissa — in return for an annual tribute (the emperor was given Allahabad and Kara; Awadh was restored to Shuja-ud-Daula on payment of an indemnity, to serve as a buffer).
Clive then set up the Dual Government (1765-72): the Company held the Diwani (revenue collection) and the military power, while the Nawab kept the Nizamat (police, justice and administration) in name. The Company thus enjoyed "power without responsibility", and the Nawab "responsibility without power". The result was ruinous misgovernment and the terrible Bengal Famine of 1770; the system was finally abolished by Warren Hastings in 1772, when the Company took over the administration directly.
The Plunder of Bengal & the Famine of 1770
Conquest turned quickly to plunder. After Plassey the Company and its servants extracted enormous "presents" and indemnities; Clive himself took a vast personal fortune and a jagir (an estate yielding a large annual rent). Worse still was a structural change: once it held the Diwani, the Company stopped importing silver to buy Indian goods and instead financed its exports — the "Investment" — out of Bengal's own tax revenue. Bengal was, in effect, made to pay for the goods drained out of it — the mechanism at the heart of the "drain of wealth."
The human cost was catastrophic. The misgovernment of the Dual Government period culminated in the Great Bengal Famine of 1770, which is estimated to have killed about one-third of Bengal's population (roughly ten million people) — even as the Company continued to collect its revenue. It was this misrule and disaster that forced reform, leading Warren Hastings to abolish the Dual Government in 1772.
Why This Matters for UPSC
Prelims: Bengal's exports (the 2018 PYQ below); the Black Hole of Calcutta (1756, Holwell's account); the independent Nawabs (Murshid Quli, Alivardi, Siraj); Plassey (23 June 1757, Clive, Mir Jafar's treachery); Mir Qasim & the dastak dispute; Buxar (22 Oct 1764, Munro vs Mir Qasim + Shuja-ud-Daula + Shah Alam II); the Treaty of Allahabad (1765), Diwani; the Dual Government (abolished 1772); the "Investment" and the Famine of 1770.
Mains: why Buxar was more decisive than Plassey; how trade privileges and their abuse led to conquest; and the consequences of the Dual Government for Bengal.
Further Reading
Standard NCERT-level texts and reference books on modern Indian history (any UPSC reading list).
Test Yourself: Practice Questions & PYQs
Test how well you can explain the conquest of Bengal — Plassey, Buxar, the Diwani and the Dual Government. Decide your answer, then open Show answer.
Practice Questions
Q1. Which governors made Bengal virtually independent of the Mughals in the early 18th century?
(a) Shah Alam II and Najib-ud-Daula
(b) Siraj-ud-Daulah and Mir Jafar
(c) Mir Qasim and Shuja-ud-Daula
(d) Murshid Quli Khan and Alivardi Khan
Show answer
Answer: (d) — Murshid Quli Khan and then Alivardi Khan ran Bengal as virtually independent rulers, keeping tight control over the European companies.
Q2. The immediate cause of the conflict between Siraj-ud-Daulah and the English was the English:
(a) minting of coins
(b) refusal to pay tribute
(c) fortification of Calcutta without permission
(d) alliance with the Marathas
Show answer
Answer: (c) — Siraj saw the unauthorised fortification of Calcutta as an attack on his sovereignty; when the English refused to stop, he seized Calcutta (1756).
Q3. The Battle of Plassey was fought on:
(a) 1765
(b) 1772
(c) 22 October 1764
(d) 23 June 1757
Show answer
Answer: (d) — Plassey was fought on 23 June 1757, near Murshidabad, between Clive and Siraj-ud-Daulah.
Q4. Plassey is called 'a battle only in name' because:
(a) it lasted only an hour
(b) the bulk of the Nawab's army (under Mir Jafar) took no part in the fighting
(c) it was fought at sea
(d) no shots were fired
Show answer
Answer: (b) — The traitors Mir Jafar and Rai Durlabh held back most of the Nawab's army; the English lost only 29 men. The victory was won by conspiracy, not arms.
Q5. After Plassey, the English made the new Nawab of Bengal:
(a) Mir Qasim
(b) Shuja-ud-Daula
(c) Najib-ud-Daula
(d) Mir Jafar
Show answer
Answer: (d) — Mir Jafar, the chief conspirator, was made the puppet Nawab and paid the Company about Rs 1.77 crore.
Q6. The English deposed Mir Jafar and installed Mir Qasim (1760), but soon quarrelled with Mir Qasim chiefly over:
(a) the capital's location only
(b) the abuse of the dastak (duty-free pass) in private trade
(c) the partition of Bengal
(d) religious policy
Show answer
Answer: (b) — Company servants misused the dastak for private trade, ruining the Nawab's revenue; when Mir Qasim abolished all internal duties to equalise trade, war broke out.
Q7. At the Battle of Buxar (1764), the British under Hector Munro defeated a combined army of:
(a) Mir Qasim, Shuja-ud-Daula of Awadh and Emperor Shah Alam II
(b) the Marathas, Mysore and Hyderabad
(c) the Sikhs and the Rohillas
(d) the Nizam and Tipu Sultan
Show answer
Answer: (a) — Buxar pitted Munro against the triple alliance of Mir Qasim, the Awadh Nawab Shuja-ud-Daula and the Mughal Emperor Shah Alam II — and the British won decisively.
Q8. Why is the Battle of Buxar considered more decisive than Plassey?
(a) it was larger
(b) it made the English a great power across north India by defeating the Awadh Nawab and the Mughal Emperor himself
(c) it ended the Mughal Empire
(d) it gave the English the whole of India
Show answer
Answer: (b) — Plassey won Bengal by intrigue; Buxar, won by force against the emperor and Awadh, established British supremacy over northern India.
Q9. By the Treaty of Allahabad (1765), the Company obtained the Diwani — the right to:
(a) trade with China
(b) collect the revenues of Bengal, Bihar and Orissa
(c) command the Mughal army
(d) appoint the Nawab
Show answer
Answer: (b) — Shah Alam II granted the Company the Diwani (revenue collection) of Bengal, Bihar and Orissa, the legal basis of the Dual Government.
Q10. The 'Black Hole of Calcutta' incident (1756) is based on the disputed account of:
(a) Robert Clive
(b) J.Z. Holwell
(c) Warren Hastings
(d) Admiral Watson
Show answer
Answer: (b) — The story — that 146 prisoners were locked overnight and 123 suffocated — comes from J.Z. Holwell's account, which modern historians regard as grossly exaggerated.
Q11. After it obtained the Diwani, the Company financed its 'Investment' (purchase of Indian goods for export) out of:
(a) Bengal's own land revenue
(b) silver imported from Britain
(c) profits from the China trade
(d) loans from Indian bankers
Show answer
Answer: (a) — Instead of importing bullion, the Company bought its export goods from Bengal's own tax revenue — the core mechanism of the 'drain of wealth'; the misrule culminated in the Bengal Famine of 1770.
UPSC Previous Year Questions (PYQs)
The conquest of Bengal is a foundational Prelims topic (the question below is a real UPSC PYQ, CSE 2018) — expect questions on Plassey, Buxar, the Diwani and the dates.
Q1. The staple commodities of export by the English East India Company from Bengal in the middle of the 18th century were: (UPSC CSE 2018)
(a) Raw cotton, oil-seeds and opium
(b) Copper, silver, gold, spices and tea
(c) Sugar, salt, zinc and lead
(d) Cotton, silk, saltpetre and opium
Show answer
Answer: (d) — Bengal's wealth — the prize the English fought for — lay in its cotton and silk textiles, saltpetre (for gunpowder) and opium. So option (d) is correct.
Mains Practice Questions
Use these to frame full-length answers. You don't have to answer one exactly — they show the angles UPSC tests, so let them guide which points you cover.
How did trade privileges and their abuse lead to the English conquest of Bengal?
“Plassey was won by conspiracy, Buxar by arms.” Compare the two battles and their significance.
Explain the working and consequences of the Dual Government in Bengal (1765-72).
Why did the Battle of Buxar establish British supremacy in northern India?