Bihar and Orissa Province Bihar and Orissa Province Bihar and Orissa was a province of British India which included the present-day Indian states of Bihar, Jharkhand, and a part of Odisha. The territories were conquered by the British in the 18th and 19th centuries, and were part of the Bengal Presidency, the largest British province in India. On 22 March 1912 both Bihar and Orissa division were separated from the Bengal Presidency as Bihar and Orissa Province. On 1 April 1936 Bihar and Orissa became separate provinces. In 1756 Bihar was part of Bengal Subah of Mughal Empire while Orissa was a different Subah.
Bihar distance inside Nepal and to the north of Bihar, the mountains influence Bihar's landforms, climate, hydrology and culture. Central parts of Bihar have some small hills, for example the Rajgir hills. To the south is the Chota Nagpur plateau, which was part of Bihar until 2000 but now is part of a separate state called Jharkhand. Bihar has notified forest area of , which is 7.2% of its geographical area. The sub Himalayan foothill of Someshwar and the Dun ranges in the Champaran district are another belt of moist deciduous forests. These also consist of scrub, grass and reeds. Here