The British East India Company under Robert Clive won the Battle of Plassey on 23 June 17571, defeating Siraj ud-Daulah, Nawab of Bengal, despite being outnumbered more than ten to one2. The battle was decided less by fighting than by treachery: the Nawab's general Mir Jafar held most of the army back after a secret deal with the Company. Plassey gave the Company control of wealthy Bengal and is seen as the foundation of British rule in India.
On a monsoon day in 1757, outside a mango grove at Plassey in Bengal, a few thousand soldiers of the British East India Company faced a Bengali army many times their size. Yet the battle was half-won before a shot was fired, through a secret bargain, and its outcome set Britain on the road to an Indian empire.
The Company and the Nawab
By the 1750s the British East India Company was a trading power with its own troops, and its growth alarmed Siraj ud-Daulah, the young Nawab of Bengal, who had stormed the Company's base at Calcutta in 1756.3 Robert Clive retook the city and marched against the Nawab4, but was badly outnumbered and far from help.
A conspiracy before the battle
Rather than rely on arms alone, Clive and the Company plotted with discontented figures at the Nawab's court. Chief among them was Mir Jafar, one of Siraj's commanders, who agreed to hold his large part of the army out of the fight in exchange for being made Nawab himself.2 The battle was, in effect, decided in advance.
The fight at the mango grove
On 23 June 1757 the armies met near Plassey. A monsoon downpour soaked both sides, but the Company kept its powder and cannon dry under covers1 while the Nawab's artillery, served partly by French gunners, fell silent. When the Nawab's cavalry advanced through the rain they were met by disciplined Company fire from the grove.
Treachery and collapse
As the fighting wavered, Mir Jafar and his huge contingent stood aside, exactly as arranged. A loyal commander who pressed the attack was killed3, and the Nawab, seeing himself betrayed, lost his nerve and fled. His leaderless army dissolved. Company losses were trivial; the day was won at little cost in blood and much in intrigue.
Why Plassey mattered
Plassey handed the Company control of Bengal, the richest province of India, and its revenues. Mir Jafar became a puppet Nawab, and the Company the true power behind him. Historians treat the battle as the foundation of British rule in India2, a turning point won as much by money and betrayal as by arms.