Afghanistan; India; Bengal: Sher Shah Suri (1486 - May 22; 1545); also known as Sher Khan (The Lion King); was a powerful Afghan (Pashtun) conqueror in medieval Delhi; India. He first served as a private before rising to become a commander in the army of Mughal leader Babur and finally the governor of Bihar. In 1537; when the new Mughal leader Humayun was elsewhere on an expedition; Sher Shah Suri overran Bengal and became the new emperor after establishing the Suri Empire.