1. The Foundation of British Hegemony: Bengal (Plassey to Buxar)
The British conquest of India did not begin with a grand imperial plan, but rather with the preservation and expansion of trading privileges in the wealthy province of Bengal. Bengal on the eve of the British conquest was the richest province of the Mughal Empire, exporting lucrative commodities like silk, cotton, saltpetre, and indigo. The friction between the independent-minded Nawab of Bengal, Siraj-ud-daula, and the East India Company over the misuse of trade permits (dastaks) and the unauthorized fortification of Calcutta culminated in the historic Battle of Plassey on June 23, 1757.
Plassey, however, was not a hard-fought military victory but a triumph of conspiracy. Robert Clive bribed the Nawab’s commander-in-chief, Mir Jafar, along with influential bankers like Jagat Seth. Siraj-ud-daula was defeated and executed, and Mir Jafar was installed as a puppet Nawab. This battle laid the foundation of British political influence in Bengal, giving them access to vast revenues which they used to finance further military conquests across India.
The real consolidation of British power occurred seven years later at the Battle of Buxar on October 22, 1764. Unlike Plassey, Buxar was a fiercely contested military engagement. The EIC forces, led by Major Hector Munro, decisively defeated the combined allied forces of Mir Kasim (the disgruntled former Nawab of Bengal), Shuja-ud-daula (the Nawab of Awadh), and the Mughal Emperor Shah Alam II. Buxar proved the military superiority of the British army and established them as the de facto masters of Northern India.
The Dual Government of Bengal (1765–1772): Introduced by Robert Clive through the Treaty of Allahabad (1765), this system divided Bengal’s administration into two parts: Diwani (the right to collect revenues, held by the EIC) and Nizamat (police and judicial administration, left with the puppet Nawab). This gave the Company absolute power without any administrative responsibility, leading to rampant corruption and the devastating Bengal Famine of 1770. It was eventually abolished by Warren Hastings in 1772.
2. Subduing the Southern and Western Powers: Mysore and the Marathas
With Bengal secured, the British turned their attention to the formidable regional kingdoms of the south and west. Mysore, under the dynamic leadership of Haidar Ali and his son Tipu Sultan, posed a major threat to British mercantile interests on the Malabar Coast. Over the course of four Anglo-Mysore Wars spanning three decades, the British systematically dismantled the Mysorean state:
- First Anglo-Mysore War (1767–69): Haidar Ali humiliated the British, forcing them to sign the defensive Treaty of Madras.
- Second Anglo-Mysore War (1780–84): Haidar Ali died of cancer mid-war; Tipu Sultan continued the fight, ending in a stalemate with the Treaty of Mangalore.
- Third Anglo-Mysore War (1790–92): Lord Cornwallis allied with the Marathas and the Nizam of Hyderabad to defeat Tipu, forcing him to surrender half his territory under the harsh Treaty of Seringapatam.
- Fourth Anglo-Mysore War (1799): Lord Wellesley launched a decisive assault. Tipu Sultan died defending his capital, Seringapatam. Mysore was placed under a puppet ruler of the old Wodeyar dynasty under a Subsidiary Alliance.
The Marathas, who had once dreamed of replacing the Mughals as rulers of India, fell victim to internal disunity. The British exploited the rivalries between the prominent Maratha houses—the Peshwa of Pune, Scindia of Gwalior, Holkar of Indore, Gaekwad of Baroda, and Bhonsle of Nagpur. The First Anglo-Maratha War (1775–82) ended in a stalemate with the Treaty of Salbai, granting the British twenty years of peace to focus on Mysore.
The Second Anglo-Maratha War (1803–05) was triggered when Peshwa Baji Rao II signed the humiliating Treaty of Bassein (1802), accepting a British Subsidiary Alliance. The other Maratha chiefs rose in rebellion but were defeated individually. The Third Anglo-Maratha War (1817–19), initiated under Lord Hastings, saw the
