Zamindars and Afghan chiefs. He fought with Musa Khan, the leader of Bara-Bhuiyans, and by the end of 1611 Musa Khan was subdued. Islam Khan also defeated Pratapaditya of Jessore, Ram Chandra of Bakla and Ananta Manikya of Bhulua. He annexed the kingdom of Kamrup and subdued Koch Bihar and Kachhar, thus taking total control over entire Bengal other than Chittagong. Shaista Khan Shaista Khan was appointed the Subahdar (Governor) of Bengal upon the death of Mir Jumla II in 1663. He was the longest-serving governor of Bengal. He ruled the province from his administrative headquarters in Dhaka for almost 24 years from 1664 to 1688. Shaista Khan's great fame in Bengal chiefly rests on his re-conquest of Chittagong. Though Chittagong came under the control of Bengal during Sultan Fakhruddin Mubarak Shah's reign in the mid-14th century, it subsequently fell into the hands of Arakanese rulers. Shaista Khan gave priority to recapturing Chittagong, and was able to do so in January 1666. The conquest brought a relief and peace to the people of Chittagong as pirates had caused a great distress to the local population. Nawabs of Bengal Mughal appointments of agents in Bengal ceased by 1713 because the empire was weakening. In 1715, the capital was shifted to Murshidabad. This resulted in Dhaka's decline. This transfer happened when the province's main tax officer, Murshid Quli Khan, who had transferred his office to Maksudabad (renamed Murshidabad after him) became governor. Murshidabad was located at a more central position in Bengal, whose administrative limits at the time also included Bihar and Orissa. In addition to changing the capital, Murshid Quli Khan modified the tax collection system. Murshid Quli Khan wanted to create a line of governing nawabs like the contemporary governors of Oudh. He was succeeded by family members. However, Alivardi Khan established another nawab family. He collaborated with Jagat Seth to defeat the governor and secured the post of governor from the Mughal ruler through bribery. He also became diwan of Orissa. However, he faced problems from Maratha raiders present in Orissa. Nawab Alivardi Khan repulsed the first three Maratha invasions of Bengal. But they invaded again, and in 1751, Alivardi Khan signed a peace treaty with the Marathas. He ceded the province of Orissa to the Maratha Empire and agreed to pay twelve lakhs of rupees annually as chauth (tribute). He crushed an uprising of the Afghans in Bihar