Existing comment:
George B. McClellan:
A superb organizer, he did more than anyone to create the Army of the Potomac. Yet he could not overcome his own hesitancy in the field, or Confederate defenses outside Richmond.
Summoned to overall command a second time following General Pope's defeat, he turned back Lee's invasion of the North at Antietam, but lacked the will to go after the retreating rebels. |