<Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> The Nawabs of Bengal (full title, the Nawab Nizam of Bengal and Orissa) were the rulers of the then provinces of Bengal and Orissa . Between 1717 and 1765, they served as the rulers of the subah (or province) of Bengal . However, they were only nominally subordinate to the Mughal Empire . Siraj ud - Daulah, the last independent Nawab of Bengal was betrayed in the Battle of Plassey by Mir Jafar . He lost to the British, who took over the charge of Bengal in 1757, installed Mir Jafar on the Masnad (throne) and established itself to a political power in Bengal . </P> <P> In 1765 the system of Dual Government was established, in which the Nawabs ruled on behalf of the British and were mere puppets to the British . In 1772 the system was abolished and Bengal was brought under direct control of the British . In 1793, when the Nizamat (governorship) of the Nawab was also taken away from them, they remained as the mere pensioners of the British East India Company . The last Nawab of Bengal, Mansur Ali Khan abdicated on 1 November 1880 in favour of his eldest son, Hassan Ali Mirza . </P>

Who declare bengal an independent state in 1771
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