Hari Singh Nalwa was Commander-in-Chief of the Sikh Khalsa Army from 1825 to 1837. He is known for his role in the conquests of Kasur, Sialkot, Multan, Kashmir, Attock and Peshawar. Nalwa led the Sikh army in freeing Shah Shuja from Kashmir and secured the Koh-i-Nor diamond for Maharaja Ranjit Singh. He served as governor of Kashmir and Hazara and established a mint on behalf of the Sikh empire to facilitate revenue collection. His frontier policy of holding the Khyber Pass was later used by the British Raj. Nalwa was responsible for expanding the frontier of Sikh empire to the Indus River. At the time of his death, the western boundary of the Sikh Empire was the Khyber Pass.