Tughlaq dynasty
The Tughlaq dynasty was established by Ghiyasuddin Tughlaq (Ghazi Malik) in 1320 AD after killing Delhi Sultan Khusrao Khan. Ghiyasuddin's last military campaign was the Bengal conquest. He sent a military expedition to Bengal-Bihar in 1324 AD. Lakhnauti ruler Naseeruddin surrendered but Sonar village ruler Ghiyasuddin Bahadur protested, who was defeated and sent to Delhi. It was during the time of the Tughlaq dynasty that the Sultans of Delhi established significant dominance over Bihar. Ghiyasuddin Tughlaq, while returning from the Bengal campaign in 1324 AD, defeated Hari Singh Dev, the Karnat dynasty ruler of North Bihar. Thus the Turkish army captured Dumraogarh, the capital of Tirhut and returned to Delhi after handing over the command of the state to Ahmed. After the death of Ghiyasuddin in 1325 AD, his son Ulukh Khan later became the Sultan of Delhi by the name of Jauna Sa Muhammad-bin-Tughlaq. During the reign of Muhammad-bin-Tughlaq, the governor of Bihar was Makhdul Mulk...