As the Iliyas Shahi dynasty became weak, Raja Ganesha=kAns, a powerful hindu land owner of bhAturiYA in north Bengal, captured power, and in 1415, declared himself the king of Bengal. Though he was probably a good ruler, he was a staunch hindu: worshipped of caNDIdevI, and follower of vaishnavite brahmin padmalAbha. Though he probably constructed the tomb of Fateh Khan in gauD.a, the eklAkhi palace in pANDuA, and renovated the AdinA masjid, he destroyed a few mosques and oppressed many muslims, mainly in the political arena. For this reason, he was opposed by the powerful darbesh community. They, underthe leadership of Nur Qutb Alam, invited Ibrahim Shah (1402–1440), the sharqi ruler of jaunpur to put an end to the atrocities of Ganesha. Raja Ganesha was supported by shivasiMha of mithilA, but he was defeated and his father devasiMha was reinstated as governor. In 1415, Raja Ganesha was also defeated when his son yadu=jitmal took Islam and joined Ibrahim Shah Sharqi. Yadu took over Bengal as Sultan Jalal-ud-din Muhammed Shah (1415–1417, 1419–1431 1432?). However, soon after Ibrahim Shah went back to Jaunpur, Raja Ganesha started controlling his son, reconverted him to hinduism, and the well-being of the muslims declined. As Raja Ganesha became more powerful, he usurped the throne as danujamardanadeva (1417–1419), but died soon. He was followed by a another follower of caNDI, mahendradeva, possibly a second son of Ganesha, for less than a few months.
After this Jalal-ud-din regained power. He moved his captal to gauD.a from pANDuA. Ibrahim Sharqi attacked his kingdom, but censure from Yung-Lo and Shah Rukh caused him to withdraw. Jalal-ud-din helped Meng Soam-un = Narmeikhla, king of Arakan, recover his kingdom from Burma; in return he became the overlord of Arakan. He, at some point, also ruled over parts of Tripura and southern Bihar. Jalal-ud-din was a devout muslim, he rebuilt many of the mosques destroyed by his father, accepted the sect of Abu Hanifa, constructed a number of houses and madrasa in Mecca, and had diplomatic relations with the Khalifa and Al-ashraf Barsbay of Egypt. His coins carry the kalma, and he took the title of khalifat allah towards the end of his reign. He is known to have provided beef but no alcohol at his feasts. He forcible converted many hindus to islam, resulting in many hindus fleeing to kAmarUpa; and he tortured the brahmins that participated in his reconversion to hinduism into eating beef. However, he did make a hindu Ray Rajyadhara a general, and respected Brihaspati Mishra, the author of smRtiratnahAra.
He is followed by his son shams-ud-din ahmad shah(1431 1433? - 1435? 1437?; possibly assasinated in 1442), the exact period of his rule is controversial. Most likely, he ruled for only three years or so. Similarly, descriptions differ as to whether he was a just king who gave a lot of alms and was somewhat pro-hindu or whether he was a blood thirsty tyrant who used to cut open the wombs of pregnant mothers. He may have been assasinated by his slaves Sadi Khan and Nasir Khan.
Up to history of Muslim Period of Bengal