This military biography explores the life and service of a British Indian Army officer who served with distinction across both world wars. During the First World War, Field Marshal Claude Auchinleck was awarded a Distinguished Service Order for his efforts in Egypt and the Mesopotamian Campaign. Afterward, he aided the pacification of the Northwest Frontier, now Pakistan. In the Second World War he briefly led a division in the ill-fated Norway campaign before being appointed Commander-in-Chief, India. Auchinleck is best remembered for his time as Commander-in-Chief of the Middle East Theatre, where he halted Rommel at the First Battle of El Alamein. He then resumed command in India, where his leadership was vital to success in Burma. In the post-war years, he planned and oversaw the Partition of India and the British withdrawal. In this extensively researched biography, historian Evan McGilvray examines Auchinleck's long career as well as the transformations of the British military and the Empire itself.