Although often counted among the Union's top five generals, George Henry Thomas has still not received his due. A Virginian who sided with the North in the Civil War, he was a more complicated commander than traditional views have allowed. Brian Wills now provides a new and more complete look at the life of a man known to history as "The Rock of Chickamauga," to his troops as "Old Pap," and to General William T. Sherman as a soldier who was "as true as steel."While biographers have long been hampered by Thomas's lack of personal papers, Wills has drawn on previously untapped sources-notably the correspondence of Thomas's contemporaries-to offer new insights into what made him tick. Focusing on Thomas's personality and motivations, Wills contributes revealing discussions of his style and approach to command and successfully captures his troubled interactions with other Union commanders, providing a particularly more evenhanded evaluation of his relationship with Grant.