Question

What were the consequence of battle of buxar?how did it affect the indian ruler?

Answer 1

The Battle of Buxar was fought on 22 October 1764 between the forces under the command of the British East India Company led by Hector Munro and the combined armies of Mir Qasim, Nawab of Bengal till 1763; the Nawab of Awadh; and the Mughal Emperor Shah Alam II.The battle fought at Buxar, a "small fortified town" within the territory of Bengal, located on the banks of the Ganges river about 130 kilometres (81 mi) west of Patna, was a decisive victory for the British East India Company. Shuja-ud-Daulah and Shah Alam surrendered and the war came to an end by the "Treaty of Allahabad" in 1765.
Aftermath

The British victory at Buxar had "at one fell swoop, disposed of the three main scions of Mughal power in Upper India. Mir Kasim [Qasim] disappeared into an impoverished obscurity. Shah Alam realigned himself with the British, and Shah Shuja [Shuja-ud-Daula] fled west hotly pursued by the victors. The whole Ganges valley lay at the Company's mercy; Shah Shuja eventually surrendered; henceforth Company troops became the power-brokers throughout Oudh as well as Bihar".