An examination of the life of General Manton S. Eddy, this study details his experiences in World War II as leader of the U.S. 9th Infantry Division through North Africa, Sicily and France, and subsequently, as commander of XII Corps, into the heart of Germany. While much has been written about the top military leaders of this era, there is little information about corps commanders whose missions were limited to doing battle and whose organizations were tailored exclusively for this task. Eddy's career provides a model for the Army's most ambitious officers, particularly those who, like Eddy, faced the challenge without family connections or the traditional West Point education. He devoted his life to the U.S. Army, enhancing his innate talents through the incorporation of a daily program of self-education.Eddy had an excellent grasp of the basic principles of military tactics and strategy. He attained this art through home study and assiduous application at the Army's professional education institutions, in particular at the Command and General Staff College, where he served as an instructor for four years. He focused on people, quickly learning and applying basic skills to draw out their best efforts. He came to know what to expect from them in the chaos and under the pressure of combat. This facilitated his development of strong, mission-oriented subordinates. His personal goal was always to maximize all available power at the correct point for crushing his nation's enemies, and to this end, he was extraordinarily successful.