Bengal was the richest province in India. Its conquest laid the solid foundation of the British Empire.
- Misuse of Dastaks: Company officials misused trade permits (dastaks) for private trade, depriving the Bengal Nawab of legitimate revenue.
- Battle of Plassey (23 June 1757): Siraj-ud-Daulah was defeated due to the betrayal of Mir Jafar and Jagat Seth. Robert Clive became the master of Bengal.
- Battle of Buxar (22 October 1764): Hector Munro defeated the combined forces of Mir Qasim, Shuja-ud-Daulah (Awadh), and Shah Alam II (Mughal Emperor).
- Treaty of Allahabad (1765): Concluded in two parts by Robert Clive; granted Diwani rights of Bengal, Bihar, and Orissa to the East India Company.
- Dual Government in Bengal: Introduced by Robert Clive (1765-1772), where the Company held Diwani (revenue) and the Nawab held Nizamat (police/judicial) powers.
| Treaty | Year | Context / Parties |
|---|---|---|
| Treaty of Allahabad | 1765 | Clive, Shuja-ud-Daulah & Shah Alam II |
| Treaty of Madras | 1769 | British and Haidar Ali (First Anglo-Mysore) |
| Treaty of Salbai | 1782 | British and Marathas (First Anglo-Maratha) |
| Treaty of Seringapatam | 1792 | Cornwallis and Tipu Sultan |
| Treaty of Lahore | 1846 | British and Lahore Durbar (First Anglo-Sikh) |