Time to resurrect a topic. :laugh2:
I went to Spotsylvania in August to walk the field and see all that I had read about. I grabbed my copy of Gordon Rhea's book and headed down there, and learned some interesting things.
The reason (as I understand it) that the attack failed is a combination of Confederate resistance, the weather (bloody awful that day) and a lack of coordination. Now, Lee had made the horrible mistake of misreading Grant and pulled his artillery out of the Mule Shoe salient, leaving his troops there no real artillery support. So Hancock's men, dashing out of the fog, plowed into the lines and were able to break the salient quite easily. Grant knew it could be done because Emory Upton had lead a similar attack two days before and punched through Doles Salient rather easily as well. So breaking the sailent was the easy part. Carrying on past was the hard part.
Confederate resistance stiffened, though it wasn't going to be enough to fully stem the breakthrough. It was enough, however, for a reserve line to be formed and to hold Hancock's Corps to only holding the salient. The weather was horrid that day, so fighting conditions were even worse than usual. Fighting in the mud is no easy task, I am sure. That, teamed with Confederate resistance, enabled Lee's Last Line to be formed.
And there was the lack of coordination. Burnside was to demonstrate as well on the Confederate right flank, at what is known as Heth's Salient. However, at this point in the Overland Campaign, Burnside's IX was still and independent command, so coordinating attacks was difficult. Enough men were able to be pulled away from here to stiffen resistance around the breakthrough.
So that is my take. I will have to go back and read that part of Rhea's work again. Hope that helps a little bit!
