Alexander M. McCook, one of the youngest major generals in the Union army, was a member of a patriotic family from Ohio that became known as the "Fighting McCooks." He participated in some of the bloodiest campaigns of the Civil War, including Bull Run, Shiloh, Perryville, Stones River and Chickamauga. In battle, McCook could be rash and reckless, but his personal courage was beyond reproach, even as his career was marked by controversy. Subjected...