Army of Empire: The Untold Story of the Indian Army in World War I by historian George Morton-Jack is a groundbreaking military history that re-evaluates the immense contribution of over 1.5 million Indian soldiers and non-combatants who served during the First World War. Drawing on primary sources, archives, and personal accounts, the book highlights how the Indian volunteer army served across global theaters—from the trenches of France and Flanders to East Africa, Mesopotamia, Gallipoli, Sinai, and Palestine.