In 1279, Tughan Khan defeated the Sena king Vishwarup Sen of eastern Bengal (present-day Assam) and established an Islamic feifdom in that region for the first time in history. He res-established the Bengali Navy, destroyed in 1243 by Narasimhadeva I at the Fort Narikella at Sonargaon. In 1280, Tughan Khan took advantage of a drought to invade South Bengal and then, Jajnagar (present-day Orissa).[3]