Once they were young: British generals at the Battle of Omdurman, 1898 by Peter Hart

In the 1880s, control over northeastern Africa was a political minefield into which Prime Minister Gladstone did not want to step - until his emissary Charles Gordon was besieged in Khartoum, and the city became the focal point for war.

It was the height of European colonialism. Injustices were administered, bloody battles fought and civilians caught in the crossfire. Among the British officers were figures who would later adopt starring roles in the First World War, such as Egyptian Army sapper Captain Herbert Kitchener.

Based on the research for his recent book "Chain of Fire", Peter looks at the experiences of the young men, who would later lead the British Army in the Great War.