George S. McClellan

George Brinton McClellan was an American soldier, Civil War Union general, civil engineer, railroad executive, and politician who served as the 24th governor of New Jersey. A graduate of West Point, McClellan served with distinction during the Mexican–American War (1846–1848), and later left the Army to serve as an executive and engineer on railroads until the outbreak of the American Civil War (1861–1865). Early in the conflict, McClellan was appointed to the rank of major general and played an important role in raising a well-trained and disciplined army, which would become the Army of the Potomac in the Eastern Theater; he served a brief period as Commanding General of the United States Army of the Union Army.