Battle of Buxar

The Battle of Buxar was a military conflict that took place on October 22-23, 1764 between the forces of the British East India Company and the combined armies of the Mughal Empire (Shah Aalam II), Nawab of Bengal (Mir Kasim), and Nawab of Awadh (Shuja-ud-Daula). It was fought near the town of Buxar, which is located in Bihar.

The combined forces had 40000 soldiers and the British Forces had 18000 forces. The British forces were led by Major Hector Munro, while the combined Mughal and Nawabi forces were led by Mir Qasim, the Nawab of Bengal, and Shuja-ud-Daulah, the Nawab of Awadh. The battle ended in a decisive victory for the British, who captured the fort at Buxar and forced the Mughal and Nawabi forces to retreat. This victory allowed the British to expand their influence in India and set the stage for their eventual domination of the region. One of the reasons of defeat of Indian side was that the three separate allies could not coordinate in a better way.
After this battle, Shah Aalam II submitted to the British. Nawab Shuja-ud-Daula fled from the scene and took refuse to Rohilla. Mir Kasim also fled and died a few years later in extreme obscurity. In the aftermath of Battle of Buxar,  the Treaty of Allahabad was signed in August, 1765.
The battle was a significant event in the history of India, as it marked the beginning of British rule in the region. Prior to the battle, the British East India Company had been a major trading presence in India, but did not have any real political power. After the battle, the Company was granted the right to collect taxes and administer justice in parts of India, which effectively made it the de facto ruler of those areas.