After the 1757 Battle of Plassey, Bengal was the first region of the Indian subcontinent conquered by the British East India Company. The company formed the Presidency of Fort William, which administered the region until 1858. A notable aspect of Company rule was the Permanent Settlement, which established the feudal zamindari system; in addition, Company policies led to the deindustrialisation of Bengal's textile industry. The capital amassed by the East India Company in Bengal was invested in the emerging Industrial Revolution in Great Britain, in industries such as textile manufacturing. The economic mismanagement directly led to the Great Bengal famine of 1770, which is estimated to have caused the deaths of about 10 million people, as a third of the population in the affected region starved to death. Several rebellions broke out during the early 19th century (including one led by Titumir), as Company rule had displaced the Muslim ruling class from power. A conservative Islamic cleric, Haji Shariatullah, sought to overthrow the British by propagating Islamic revivalism. Several towns in Bangladesh participated in the Indian Rebellion of 1857 and pledged allegiance to the last Mughal emperor, Bahadur Shah Zafar, who was later exiled to neighbouring Burma.