The Maratha invasions of Bengal (1741-1751), also known as the Maratha expeditions in Bengal, refers to the frequent invasions by the Maratha forces in the Bengal Subah (West Bengal, Bihar, parts of modern Orissa), after their successful campaign in the Carnatic region at the Battle of Trichinopoly. The leader of the expedition was Maratha Maharaja Raghoji Bhonsle of Nagpur. The Marathas invaded Bengal six times from August 1741 to May 1751. Nawab Alivardi Khan succeeded in resisting all the invasions in western Bengal, however, the frequent Maratha invasions caused great destruction in the western Bengal Subah, resulting in heavy civilian casualties and widespread economic losses. In 1751, the Marathas signed a peace treaty with the Nawab of Bengal, according to which Mir Habib (a former courtier of Alivardi Khan, who had defected to the Marathas) was made provincial governor of Orissa under nominal control of the Nawab of Bengal.