A veteran of both world wars and the Korean War, Gen. Gerald C. Thomas helped change the Marine Corps in the twentieth century. Though not as well-known as John Lejeune, Chesty Puller, and A. A. Vandegrift, he was, as this book clearly demonstrates, responsible for the transformation of the Marines into a highly effective amphibious assault force and Cold War force in readiness. In this volume, the well-known military historian Allan R. Millett provides not only an assessment of General Thomas's career but an objective analysis of the creation of the modern Marine Corps. At the same time, he offers an expert interpretation of the "inside" leadership of the Corps. Millett has based the book on documentary research in private and official papers, including the general's own oral memoir and draft autobiography.