This pioneering study examines the military leadership of Marshal Ferdinand Foch, the French commander who rose to become Supreme Allied Commander during the First World War. Going beyond a conventional biography, the book offers a critical assessment of Foch’s strategic vision, leadership, and influence on the Allied war effort. It also provides valuable insight into the complex politics of coalition warfare and the challenges of coordinating military operations among the Allied powers. As the first major critical study of one of the most celebrated commanders of the Great War, it remains an important contribution to military history.