Modern Bangladesh emerged as an independent nation in 1971 after achieving independence from Pakistan in the Bangladesh Liberation War. The country constitutes with the major portion of the ancient and historic region of Bengal in the eastern part of the Indian subcontinent, where civilization dates back over four millennia, to the Copper Age. The history of the region is closely intertwined with the history of Bengal and the history of India.
The area’s early history featured a succession of Indian empires, internal squabbling, and a tussle between Hinduism and Buddhism for dominance. Islam made its appearance during the 8th century when Sufi missionaries arrived. Later, Muslim rulers reinforced the process of conversion by building mosques, madrassas and Sufi Khanqah.
The borders of modern Bangladesh were established with the partition of Bengal and India in August 1947, when the region became East Pakistan as a part of the newly formed State of Pakistan following the Radcliffe Line. However, it was separated from West Pakistan by 1,600 km (994 mi) of Indian territory. Due to political exclusion, ethnic and linguistic discrimination, as well as economic neglect by the politically dominant westerin-wing, popular agitation and civil disobedience led to the war of independence in 1971. After independence, the new state endured famine, natural disasters and widespread poverty, as well as political turmoil and military coups. The restoration of democracy in 1991 has been followed by relative calm and economic progress.