It includes modern-day Bangladesh and the Indian states of West Bengal and Assam's Barak Valley, located in the eastern part of the Indian subcontinent, at the apex of the Bay of Bengal and dominated by the fertile Ganges delta. The advancement of civilization in Bengal dates back four millennia.[1] The region was known to the ancient Greeks and Romans as Gangaridai. The Ganges and the Brahmaputra rivers act as a geographic marker of the region, but also connects the region to the broader Indian subcontinent.[2] Bengal, at times, has played an important role in the history of the Indian subcontinent.