In Lee's Tarnished Lieutenant, William Garrett Piston examines the life of James Longstreet and explains how a man so revered during the course of the war could fall from grace so swiftly and completely. Unlike other generals in gray whose deeds are familiar to southerners and northerners alike, Longstreet has the image not of a hero but of an incompetent who lost the Battle of Gettysburg and, by extension, the war itself. Piston's reappraisal of the general's military record establishes Longstreet as an energetic corps commander with an unsurpassed ability to direct troops in combat, as a trustworthy subordinate willing to place the war effort above personal ambition. He made mistakes, but Piston shows that he did not commit the grave errors at Gettysburg and elsewhere of which he was so often accused after the war.