From trader to ruler
The English East India Company came to India to trade. Within a hundred years it ruled the country. This is the story of how that happened.
The Company did not conquer India in one sweep. It grew piece by piece, over roughly a century from 1757 to 1857, using a mix of war, alliances and clever legal tricks. It played Indian rulers against each other, took over states one at a time, and rarely fought when it could absorb a kingdom without firing a shot.
The conquest had three main tools, and this page walks through each. First, direct war — beginning in Bengal. Second, the Subsidiary Alliance, which trapped rulers into dependence. Third, the Doctrine of Lapse, which swallowed states through their own succession laws.
Bengal was the richest province in India — fertile, populous, and central to the textile trade. Whoever controlled Bengal controlled a treasury large enough to fund further conquest. This is why the Company's rise began there, and why the two battles that gave it Bengal, Plassey and Buxar, are the most important in the whole story.
The conquest of Bengal
Two battles, eight years apart, handed Bengal to the Company and set it on the path to ruling India.
The Company under Robert Clive defeated the Nawab of Bengal, Siraj-ud-Daulah, largely by bribing his commander Mir Jafar to defect. It was more a betrayal than a battle, but it made the Company the real power in Bengal.
The Company defeated the combined armies of the Nawab of Bengal, the Nawab of Awadh and the Mughal Emperor. Unlike Plassey, this was a genuine military victory, and it confirmed British power over eastern India.
After Buxar, the Mughal Emperor Shah Alam II granted the Company the Diwani — the right to collect revenue — of Bengal, Bihar and Orissa. This was the moment the Company stopped being a trader and became a ruler. It now controlled the money of the richest part of India, with no responsibility for governing it. The result was the terrible Bengal Famine of 1770.
Plassey and Buxar are the foundation of British rule. Everything after them was expansion from a base already won. They deserve close study, and each has its own page.
Read in detail — the conquest of Bengal
The two battles that began British rule.
The Subsidiary Alliance
The second tool of expansion was the Subsidiary Alliance, perfected by Lord Wellesley from 1798. It was a trap dressed as a treaty.
Under it, an Indian ruler agreed to keep a British army inside his state and to pay for it. In return the Company promised protection. But the ruler had to give up his foreign relations, could not keep his own army, and had to accept a British Resident at his court. Step by step, he lost his independence while paying for the privilege.
A ruler who took the Subsidiary Alliance became defenceless — he had no army of his own and depended entirely on the Company. If he failed to pay for the British troops, the Company took over part of his territory instead. Either way, the state was hollowed out. The Nizam of Hyderabad was the first to accept it, in 1798.
States that fell to the Subsidiary Alliance included Hyderabad, Mysore, Awadh, and the Marathas. It let the Company expand without the cost of constant war — the states paid for their own subjugation.
The Doctrine of Lapse
The third tool was the Doctrine of Lapse, associated with Lord Dalhousie from 1848. It used Indian succession law against Indian rulers.
By custom, a ruler without a natural son could adopt an heir. Dalhousie refused to recognise adopted heirs. If a ruler died without a natural son, his state lapsed — passed automatically to the Company. It was annexation through a legal technicality.
| State | Year annexed |
|---|---|
| Satara | 1848 |
| Jaitpur and Sambalpur | 1849 |
| Jhansi | 1853 |
| Nagpur | 1854 |
| Awadh | 1856 — annexed for alleged misgovernment, not lapse |
The annexation of Jhansi under the Doctrine of Lapse turned its ruler, Rani Lakshmibai, into one of the leaders of the Revolt of 1857. The annexation of Awadh in 1856, on the excuse of misrule, angered its people and soldiers deeply — many sepoys in the Company's army came from Awadh. Both fed directly into the great revolt a year later.
Read in detail — the tools of expansion
The two policies that absorbed states without war.
The wars against Indian powers
Where alliances and lapse could not reach, the Company fought. Three great series of wars removed the last powers that could have stopped it.
| Wars | Against | Result |
|---|---|---|
| Anglo-Mysore Wars | Mysore under Hyder Ali and Tipu Sultan | Four wars, 1767 to 1799. Tipu died defending Srirangapatnam |
| Anglo-Maratha Wars | The Maratha Confederacy | Three wars, 1775 to 1818. Broke the last great Indian power |
| Anglo-Sikh Wars | The Sikh Empire of Punjab | Two wars, 1845 to 1849. Ended with the annexation of Punjab |
With the Marathas broken in 1818 and Punjab annexed in 1849, no Indian power was left that could challenge the Company. It ruled, directly or indirectly, the whole subcontinent.
Read in detail — the wars
The three great military contests, each on its own page.
Three tools of conquest: War, Alliance, Lapse. War took Bengal, Mysore, the Marathas and Punjab. Alliance took Hyderabad and Awadh. Lapse took Satara, Jhansi and Nagpur.
Which two battles formed the foundation of British rule in India?
Plassey in 1757 and Buxar in 1764. Plassey made the Company the real power in Bengal, and Buxar confirmed it, leading to the grant of Diwani rights in 1765.
Before Plassey came the Black Hole of Calcutta (1756). Siraj-ud-Daulah captured Fort William, and it was alleged that a large number of British prisoners were locked overnight in a tiny room, where many died of suffocation. The incident became the British justification for the war that led to Plassey.
After winning the Diwani in 1765, the Company took the right to collect revenue but left the actual administration to the Nawab. So the Company had power without responsibility, and the Nawab had responsibility without power. This Dual Government, set up by Robert Clive, caused chaos and contributed to the Bengal Famine of 1770. It was ended by Warren Hastings in 1772, when the Company took direct charge.
Everything on one look
The battles, the tools, and the wars that built British India.
- 1757 — Battle of Plassey, Bengal won
- 1764 — Battle of Buxar
- 1765 — Diwani of Bengal, Bihar and Orissa
- 1798 — Subsidiary Alliance begun by Wellesley
- 1799 — Tipu Sultan killed, Mysore falls
- 1818 — Marathas finally broken
- 1848 — Doctrine of Lapse begun by Dalhousie
- 1849 — Punjab annexed
- War — Bengal, Mysore, Marathas, Punjab
- Subsidiary Alliance — Wellesley, from 1798
- Doctrine of Lapse — Dalhousie, from 1848
- Diwani rights made the Company a ruler in 1765
- Hyderabad was first to accept the Subsidiary Alliance
- Jhansi and Awadh annexations fed the 1857 revolt
- Plassey (1757) was won by bribery, Buxar (1764) by genuine battle
- Diwani rights were granted in 1765, after Buxar, not after Plassey
- The Subsidiary Alliance was perfected by Wellesley, from 1798
- Hyderabad was the first state to accept the Subsidiary Alliance
- The Doctrine of Lapse is associated with Dalhousie, from 1848
- Awadh was annexed for alleged misrule in 1856, not under the Doctrine of Lapse
- Jhansi was annexed under the Doctrine of Lapse, making Rani Lakshmibai a rebel leader
- The Marathas were broken in 1818, ending the last great Indian power
- Punjab was annexed in 1849 after the Second Anglo-Sikh War
- Tipu Sultan died in 1799 defending Srirangapatnam, not in an earlier war
- British expansion in India ran from about 1757 to 1857
- The Company used three tools — war, the Subsidiary Alliance, and the Doctrine of Lapse
- Bengal was conquered first because it was the richest province
- The Battle of Plassey in 1757 made the Company the real power in Bengal
- Plassey was won largely by bribing Mir Jafar to desert the Nawab
- The Battle of Buxar in 1764 was a genuine military victory over three combined armies
- The Diwani of Bengal, Bihar and Orissa was granted in 1765
- The Diwani gave the Company the right to collect revenue and made it a ruler
- The Subsidiary Alliance was perfected by Lord Wellesley from 1798
- Under the Subsidiary Alliance a ruler kept and paid for a British army and lost his foreign relations
- Hyderabad was the first state to accept the Subsidiary Alliance, in 1798
- The Doctrine of Lapse is associated with Lord Dalhousie from 1848
- Under the Doctrine of Lapse a state without a natural heir passed to the Company
- Satara, Jhansi and Nagpur were annexed under the Doctrine of Lapse
- Awadh was annexed in 1856 on the excuse of misgovernment
- The Anglo-Mysore Wars ended in 1799 with the death of Tipu Sultan
- The Anglo-Maratha Wars ended in 1818, breaking the last great Indian power
- The Anglo-Sikh Wars ended in 1849 with the annexation of Punjab
- The annexations of Jhansi and Awadh fed directly into the Revolt of 1857
- By 1849 no Indian power was left that could challenge the Company
- The Black Hole of Calcutta incident took place in 1756, before the Battle of Plassey
- Siraj-ud-Daulah was the Nawab of Bengal defeated at Plassey in 1757
- The Battle of Plassey was fought on 23 June 1757
- Dual Government in Bengal was set up by Robert Clive after the Diwani of 1765
- Dual Government was ended by Warren Hastings in 1772