Battle of Chausa was fought near Buxar. Humayun was badly defeated and Sher Khan adopted the title of Sher Shah. Humayun barely escaped with his life from the battle field.
The Tughlaq dynasty was a Muslim dynasty of Turko-Indian origin, which ruled over the Delhi sultanate in medieval India. Ghiyasuddin Tughlaq is considered to be the founder of the Tughlaq dynasty.