Bihar is a state in eastern India. It is the 12th largest state in terms of geographical size at 38,202 sq mi ( 98,940 km2 ) and 3rd largest by population. Almost 58% of biharis are below the age of 25,which is the highest proportion in India.The tenth and the last Guru of Sikhism, Guru Gobind Singh was born in Patna. After the Battle of Buxar ( 1764 ), the British East India Company obtained the diwani rights ( rights to administer, and collect revenue or tax ) for bihar, Bengal and Orissa.The rich resources of fertile Land, water and skilled labour had attracted the foreign entrepreneurs, specially the Dutch and Britishers in eighteenth century. A number of Agrio based industries had been started in bihar by the foreign entrepreneurs.

From this point, bihar remained a part the Bengal Presidency of British India until 1912, when the province of bihar and Orissa was carved out as a separate province. bihar now celebrates its birthday as bihar Diwas on 22 March from 2010. In 1935, certain portions of bihar were reorganised into the separate province of Orissa.Babu Kunwar Singh of Jagdishpur and his army, as well as countless other persons from bihar, contributed to the India's First War of Independence ( 1857 ), also called the Sepoy Mutiny by some historians. Resurgence in the history of bihar came during the struggle for India's independence.