Dwight Eisenhower represented a fundamentally new type of military commander in the 20th century: commander as manager rather than the traditional warrior commander. Armies had become so large and military coalitions so dependent on politics that this new type of commander emerged. Eisenhower never fought in a single battle, but he commanded the most modern and powerfully armed force to fight in Europe. As Supreme Commander of the Allied Expeditionary Force, Eisenhower had at his disposal not only the British, US, and French armies, but the RAF, USAAF, Royal Navy and US Navy-Atlantic. This book explores every aspect of his military career.