This man led one side at the battles of Williamsburg and the Seven Days Battles, part of the aforementioned Peninsular Campaign, and later his extreme caution also cost him a decisive victory when he left troops in reserve numbering more than the entire opposing army at an 1862 battle which ended the Confederate's Maryland Campaign.
This man was criticized by subordinate William Rosecrans for his caution at skirmishes at Rich Mountain and Philippi Races. One of this man's campaigns was stalled by the trickery of John Magruder, who made him believe that his enemy had substantially more troops. This man led one side at the battles of Williamsburg and the Seven Days Battles, part of the aforementioned Peninsular Campaign, and later his extreme caution also cost him a decisive victory when he left troops in reserve numbering more than the entire opposing army at an 1862 battle which ended the Confederate's Maryland Campaign. For 10 points, name this general, the first commander of the Army of the Potomac who led Union troops at the Battle of Antietam.
This man was criticized by subordinate William Rosecrans for his caution at skirmishes at Rich Mountain and Philippi Races.
George Brinton McClellan