Just recieved this pdf of the Army History Journal. The issue leads with an article on the Pennsylvania Division at Antietam and Fredericksburg.
"No Heroism Can Avail": Andrew A. Humphreys and His Pennsylvania Division at Antietam and Fredericksburg by Matthew T. Pearcy. Here is the link: Army History Summer 2010, no. 76 . Enjoy and pass it along.
Image Source: Pennsylvania Reserve Division monument at the Cornfield, Antietam