Let's get back to the original subject, shall we? Above is the claim made by TexConfederate which started the whole thread. Nothing he has shown or you have shown supports that claim. Nothing either of you have shown supports the claim that Dahlgren was ordered to do anything but free the prisoners in Libby. Your post from the History.net offers speculation but at best it's paper trail begins and ends with Dahlgren and Kilpatrick.
Jeez, what does someone have to do, draw you a picture?
That is a DIRECT quote from a Historical document. Admit it for once. You have been bested in this argument.