1346, describedFakhruddin as "a distinguished sovereign who loved strangers, particularly the fakirs and sufis". After the death of Fakhruddin in 1349, Ikhtiyaruddin Ghazi Shah became the next independent ruler of Sonargaon.
Ilyas Shah, the independent ruler of Lakhnauti, attacked Sonargaon in 1352. After defeatingIkhtiyaruddin Ghazi Shah, he became the sole ruler of whole Bengal for the first time in history and thus he became the founder of a sultanate of the unified Bengal.
It is thought that when a squadron of the Chinese fleet of Zheng He, commanded by the eunuch Hong Bao, visited Bengal in 1432, they visited Sonargaon as well. The information about that expedition comes from the book of one of its participants, the translator Ma Huan.
Sonargaon is the eastern terminus of the Grand Trunk Road, which was built by the Pashtunemperor Sher Shah Suri, extended approximately 2500 kilometres from Bangladesh across northern India and Pakistan to Kabul in Afghanistan.
Isa Khan's ruling
When Taj Khan Karrani was the independent Afghan ruler of Bengal, Isa Khan obtained an estate in Sonargaon and Maheswardi Pargana in 1564 as a vassal of the Karrani rulers. Isa Khan gradually increased his strength and in 1571 he was designated as the ruler of whole Bhati region. In 1575 he helped Daud Khan Karrani to fight with Mughal flotilla in the vicinity of Sonargaon.
Daud Khan Karrani died in the battle of Rajmahal against Mughals in 1576. Akbar then assigned Isa Khan as one of the Bara-Bhuiyansby making him the zamindar of Sonargaon. Since then he resisted Mughal's ruling in his area. With the help of allies, he stood defiant against Mughals in the battle against Subahdar Khan Jahan in 1578, Subahdar Shahbaz Khan in 1584 and Durjan Singh in 1597. Isa Khan died in September 1599. Then his son, Musa Khan, took control of Bhati region. But after the defeat of Musa Khan in 10 July 1610 by Islam Khan, the army general of Mughals, Sonargaon
