The history of Bengal includes modern-day Bangladesh and West Bengal 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. 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 connect it to the broader Indian subcontinent. Bengal, at times, has played an important role in the history of the Indian subcontinent.
The area's early history featured a succession of Indian empires, internal squabbling, and a tussle between Hinduism and Buddhism for dominance. Ancient Bengal was the site of several major Janapadas (kingdoms), while the earliest cities date back to the Vedic period. A thalassocracy and an entrepôt of the historic Silk Road, Ancient Bengal established colonies on Indian Ocean islands and in Southeast Asia; had strong trade links with Persia, Arabia and the Mediterranean that focused on its lucrative cotton muslin textiles. The region was part of several ancient pan-Indian empires, including the Mauryans and Guptas. It was also a bastion of regional kingdoms. The citadel of Gauda served as capital of the Gauda Kingdom, the Buddhist Pala Empire (eighth to 11th century) and Hindu Sena Empire (11th–12th century). This era saw the development of Bengali language, script, literature, music, art and architecture.