Analysis of information sources in references of the Wikipedia article "Islam in Bangladesh" in English language version.
Tradition gives him credit for the conquest of Bengal but as a matter of fact he could not subjugate the greater part of Bengal ... All that Bakhtyār can justly take credit for is that by his conquest of Western and a part of Northern Bengal he laid the foundation of the Muslim State in Bengal. The historians of the 13th century never attributed the conquest of the whole of Bengal to Bakhtyār.