George B. McMlellan lived from 1826 to 1885. He was a 2nd Lieutenant in the Corps of Engineers in the Mexican War. In the Civil War, he was Major General in the regular army, meaning that he was only outranked by one person, General-in-Chief Winfield Scott. Earning the nickname “The Young Napoleon,” McClellan greatly improved the organization of the army. However, he lost his command after the Battle of Antietam in 1862. He went on to unsuccessfully oppose Abraham Lincoln in the 1864 presidential race.
Sears, Stephen W. George B. McClellan :The Young Napoleon. New York: Da Capo Press, 1999.