In conclusion, the establishment of the British East India Company's power in Bengal was a result of their strategic alliances, manipulation of local rulers, and military victories. The Company gradually took over both the Diwani and Nizamat powers, ultimately leading to the complete control of Bengal's administration and revenue collection. The battle of Buxar and the subsequent Treaty of Allahabad marked the beginning of the Company's dominance in India, as they effectively reduced the Nawabs to mere puppets. The dual government system eventually gave way to the direct administration of Bengal by the British under Warren Hastings, who reorganized the judicial and revenue collection system, marking the end of the revolution in Bengal.
The Battle of Plassey in 1757 marked the beginning of British control over Bengal and laid the foundation for the British East India Company's eventual rule over India. The victory was largely due to the treachery of Siraj-ud-Daula's own generals, particularly Mir Jafar, who switched sides and supported the British.
Mir Qasim was the son-in-law of Mir Jafar and succeeded him as the Nawab of Bengal after the latter agreed to step down in his favor. He tried to reform the army and strengthen the province, but he faced constant opposition from the British East India Company. His refusal to reimpose trade duties on Indians led to deteriorating relations with the British, eventually resulting in his defeat in the Battle of Buxar and the end of his rule.
The Battle of Buxar in 1764 was a decisive victory for the British East India Company, as they defeated the combined forces of the Nawab of Bengal, the Nawab of Awadh, and the Mughal Emperor. This victory led to the establishment of the Company's power in Bengal and opened the door for its influence to spread into Awadh and Allahabad. It also marked the end of Mir Qasim's rule in Bengal, and the reinstallation of Mir Jafar as a puppet Nawab.
The Dual Government system in Bengal was a system where the Nawab of Bengal handled the actual work of criminal, civil, and police administration in lieu of a fixed payment by the East India Company, while the ultimate authority lay in the hands of the British, who were responsible for the external defense of the country. This system led to widespread corruption and mismanagement, as authority was divorced from responsibility. It was abolished by Warren Hastings, who took over the entire responsibility of managing and collecting revenues, as well as reorganizing the judicial machinery of the country.
Warren Hastings removed the Naib Diwan and constituted the President and the Council into a Board of Revenue. He shifted the treasury from Murshidabad to Calcutta and converted the district supervisors into Collectors. He also reorganized the judicial machinery, establishing separate civil and criminal courts at the district level, as well as superior courts at the headquarters. These changes signified the complete assumption of the government by the East India Company.