Hmmmmm that's interesting. I always thought McClellan blew it, but I guess there is debate around that also?How? all his units with the exception of less than a division of infantry was committed and used in the attacks or to cover units was was completely disordered. He had no organized formation to be more aggressive with.
His army was really not that much stronger than Lee's.
Yes it was larger, but the units came from 3 different armies, a large portion of his men was completely green and some even untrained. Way fewer of his commanders was experienced at the level they held command.
(take a look here: should give you the part of experience.
And when I say larger, Iam not talking the 2-1 or even 3-1 you sometimes see claimed.
(jump to about 36:30 in the video for the part about the army strength)
McClellan had about 87.000 men... some days before the battle. According to himself. But he really had no idea how many men he actually had.
And that number include everyone with the army, including everyone doing none combat jobs, all officers, artillerymen and cavalry.
And that count is taken a few days before the battle so the actual number on the day would be smaller, since the federals was strangling just as Lee's men where.
Lee claim that he had 40.000 men at the battle.
That is not wrong, but in this number he is only counting men in the ranks with a musket.
It do not include officers, artillery or the men driving wagons and doing other none combat jobs. (Some being soldiers... others being slaves or free colored men)
The Lecture give a 7-4 advantage for McClellan.