Bihar Bihar Bihar (; ) is an Indian state considered to be a part of Eastern and Northern India. It is the thirteenth-largest Indian state, with an area of . The third-largest state by population, it is contiguous with Uttar Pradesh to its west, Nepal to the north, the northern part of West Bengal to the east, with Jharkhand to the south. The Bihar plain is split by the river Ganges, which flows from west to east. Bihar is an amalgamation of three distinct regions: Magadh, Mithila, and Bhojpur. On 15 November 2000, southern Bihar was ceded to form the new
Provinces of Thailand Interior, responsible for the provincial administration of the whole country. Starting in 1893 the already existing commissionaireships in some parts of the country were renamed "superintendent commissioner" ("khaluang Thesaphiban"), and their area of responsibility was called a "monthon". In strategically important areas the monthon were created first, while in other areas the provinces kept their independence a bit longer. Several smaller provinces were reduced in status to a "amphoe" (district) or even lower to a "tambon" (sub-district) and included in a neighboring province, sometimes for administrative reasons, but sometimes to remove an uncooperative governor. In some regions rebellions broke out