U.S. General George B. McClellan (1826 - 1885) was a major general during the American Civil War and the Democratic presidential nominee in 1864. He organized the famous Army of the Potomac and served briefly (November 1861 to March 1862) as the general-in-chief of the Union Army.
Unusual full view image of President Lincoln visiting General McClellan in the general's tent at the Battle of Antietam. Photograph by A. Gardner 1862. Note the captured Confederate flag on the ground. *s*