Mir Kasim (reign 1760 to 1763), made an attempt to recover Bengal from the hands of British. In 1764, he enlisted the help of Mughal Emperor Shah Alam II and Nawab Shuja Ud Daulah of Oudh (Awadh). On October 23, 1764, Mir Kasim with his army was defeated at the Battle of Buxar by the British Major Hector Monro who led a contingent of 857 European soldiers and 6213 sepoys. This victory paved the way for British Empire in India.
It was a significant battle fought between the forces under the command of the British East India Company on the one side, and the combined armies of Mir Kasim, the Nawab of Bengal ; Nawab of Awadh; and Shah Alam II, the Mughal Emperor. The battle fought at Buxar, a town (currently in Bihar state, India) located on the bank of the Ganges river, was a decisive battle won by the forces of the East India Company.
The battle resulted into securing of Diwani rights to administer the collection and management of revenues of large areas which currently form parts of Indian states of West Bengal, Bihar, Jharkhand, and Uttar Pradesh , as well as of Bangladesh. The Battle of Buxar heralded the establishment of the rule of the East India Company in the eastern part of the Indian subcontinent.
Bihar became the first state in India to have separate web page for every city and village in the state on its website www.brandbihar.com (Now www.brandbharat.com)
See the record in Limca Book of Records 2012 on Page No. 217