67th Tigers
Major
- Joined
- Nov 10, 2006
Where is your source for the 6th Regulars being detached to cover Couch? Looking for a mention of it in official reports and it seems ignored.
http://www.archive.org/stream/fromyorktowntosa00cartrich#page/58/mode/2up/search/antietam
They rejoined at Sharpsburg 21st September.
Except that Lee would have no reason to attack him over and over if McClellan is just sitting there, so McClellan would wind up just sitting there waiting for Lee to attack.
I'm slightly confused, because McClellan did indeed resume offensive operations, Shephardstown etc.. His planned assault of the morning of the 18th was suspended awaiting the arrival of Couch and Humphreys, but was ordered for the morning of the 19th instead. Had Lee not retreated then he would have been attacked again.
Also, in the same spirit as the more exhaustive analysis of the ANV, here are September 20 numbers for the Army of the Potomac: http://ebooks.library.cornell.edu/cgi/t/text/pageviewer-idx?c=moawar&cc=moawar&idno=waro0028&q1=Cavalry division&view=image&seq=338&size=150
Counting 1st Corps, 2nd Corps, 5th Corps (minus six thousand for Humphrey's division based on his report of "at least six thousand present" on the 18th, and as it could not be expected earlier it is left out when trying to guesstimate strength on the 17th), 6th Corps, 9th Corps, 12th Corps and the cavalry (minus 1640 on the assumption of the five detached regiments being sixty companies of the same average as 67th Tigers calculated).
72, 036. Casualties suffered at Antietam were 12,469 per McClellan's official report, which would mean 84,505 men present for duty (which does not count men detached for special duty, or sick, or under arrest) assuming no regiments other than Humphrey's came up between the 17th and the 20th.
McClellan's official report estimates the following:
First Corps 14,856
Second Corps 18,813
Fifth Corps (one division not arrived) 12,930
Sixth Corps 12,300
Ninth Corps 13,819
Twelfth Corps 10,126
Cavalry Division 4,320
Total in action 87,164
But if we subtract 1640 for the detached regiments of the cavalry, we are left with 85, 524 - a figure close enough to the above calculation based on the morning report as to mean that either both are wrong, or that the information is approximately accurate (allowing for individual brigades possibly being over or under depending on which we rely on).
It is not clear if McClellan's report of "total in action" for 1st Corps includes (for example) the 16th Maine (730 officers and men) anymore than it is clear if the cavalry division's reported numbers are including detached regiments, but assuming not would move McClellan's numbers closer to 80,000.
That is still a larger disparity of numbers than that enjoyed by Meade at Gettysburg, if less so than Hooker had at Chancellorsville (owing in part to nine of Lee's infantry brigades being detached at that time), and I haven't checked for Fredericksburg yet.
This was gone over in a previous post:
http://civilwartalk.com/threads/re-evaluating-george-mcclellan.100689/page-7#post-894644
Via Carman the total effective force for McClellan on the field (deducting absent cavalry at 1,400) would be 67,428. That's probably an overestimate as a considerable number of the new regiments men dropped out but the commanders didn't report it, and Morell's strength is definitely PFD. In round figures McClellan probably had about 48,000 effectives on the field at dawn of the 17th, with another 12,000 coming in during the morning and forenoon.
Lee had probably 40-50,000. Going by Carman (a low estimate) Lee had 35,000 on the field with about 3,000 reinforcements (AP Hill).
At Gettysburg 93,500 Union effectives held off about 70,000 Confederates. (link).