The victory of Ikhtiaruddin Mohammad Ibne Bakhtiar Khalji over Nadia in 1204 A.D is associated with the establishment of Muslim rule in Bengal.
Firstly the history of Bengal concentrated on Gour, the Muslim capital of Bengal. But at the same time the south-eastern part of Bengal remained beyond the influences of the Muslim rulers for the next hundred years. During the time of Hindu Moharajas (rulers) this part of the country was called ‘Lakhnouti'(Muslim name of Nadia, the term ‘Bengal’ comes later) .
Giasuddin Iyaz Khalji tried to take into custody east Bengal in 1227A.D and later in 1236 A.D. After that Delhi (Mughals Capital of Sub continent during this time) seized the control of Lakhnouti and made it a province until 1287. As it was one of the fareast provinces from Delhi and for its forested topography 10 and heavy monsoon climate it was set apart from other places in north India. The central administration could not control the administrative work in this area. For that reason the independent Sultan of Lakhnouti, Shamsuddin Feroz Shah took over a part of east Bengal in 1300 A.D. In 1324 the Tughluq sultan marched to Lakhnouti and divided the country into three administrative units, Lakhnouti, Shatgaon and Sonargaon (fig, 1.1). In 1338 Sultan Mubarak Shah declared his independence from Sonargaon (centre of east Bengal) against Delhi administration. In 1342 Shamsuddin Illyas Shah became the Sultan and united the three units to form Bengal in 1352. He successfully protected his independent country from the attacks of central Delhi. And from 1352 to early th 16 century the independent Sultanate period in Bengal prevailed.