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George Brinton McClellan (December 3, 1826 – October 29, 1885) was a major general during the American Civil War. 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. Early in the war, McClellan played an important role in raising a well-trained and organized army for the Union. However, although McClellan was meticulous in his planning and preparations, these attributes may have hampered his ability to challenge aggressive opponents in a fast-moving battlefield environment. He chronically overestimated the strength of enemy units and was reluctant to apply principles of mass, frequently leaving large portions of his army unengaged at decisive points.

McClellan was born in Philadelphia, the son of a prominent surgical ophthalmologist, Dr. George McClellan, the founder of Jefferson Medical College. His mother was Elizabeth Steinmetz Brinton McClellan, daughter of a leading Pennsylvania family. The couple produced five children: a daughter, Frederica; then three sons, John, George, and Arthur; and a second daughter, Mary. (Read more...)