Sikh Faces of the First World War: Hero of Waziristan.
Now best remembered as the first Sikh recipient of the Victoria Cross, this is Ishar Singh of the 28th Punjabis photographed as a young soldier in 1921.
Ishar Singh's joined the 28th Punjab Regiment during in the period that saw 1.3 million Indian men join the British armed forces's as volunteers to fight for the empire.
His regiment served in Mesopotamia, where they fought in the bloody battles on the Tigris Front, as the British made desperate efforts to relieve their besieged garrison at Kut al Amara.
In 1917, the regiment took part in the Third Battle of Sannaiyat, the Capture of Baghdad, and the actions at Istabulat and Tekrit.
In 1918, the 28th Punjabis participated in the British campaign in Palestine. During the war, the regiment suffered a total of 1423 casualties.
Picture credit: Trustees of the National Army Museum