@breckod
I poked into the new Varney book, but haven't read it yet much. I wasn't very impressed with the first one.
Regarding, Rosecrans' actions on the 20th, amazingly, I am not sure that I would say that that is a perfect analogy. What
is true though is that in the face of the evidence, some people actually seem to believe that Rosecrans "fled" the field, or "skulked" away, or some other silly suggestion along those lines. That is definitely a concern in that the available evidence really weighs massively against that conclusion. One can certainly argue that Rosecrans should have tried to ride south himself first, in order to see if he could get through to whatever was still on the field. That is fine. However, if you really look at
all of the available evidence, the suggestion as to fleeing, or skulking away, is just not really in the cards. There is really no other conclusion which can be come to that I can see.
Now, again, moving back to the quote provided above, the analogy which Varney makes there is not a perfect one, but it does have
some merit. The distances involved on September 20th at Chickamauga were greater and there were other additional considerations which had to be factored into Rosecrans' decision, though. If Rosecrans were to have stopped at Rossville, which was also an option, he could have tried to coordinate the dual purposes from there, once he knew the situation as it existed on the field. The question as to how much sense that would make if it was possible that much of the Army had been driven in, is a serious question though. If he had known that as substantial an element of the Army still remained as it did, stopping in Rossville makes the most sense that way and he may have done it. My principle concern with that though, is that the government in Washington needed to be notified that the Army had sustained a serious defeat and if the Army had been driven in to a substantial degree, the threat of the telegraph line with Chattanooga being cut by Confederate cavalry would have probably been heightened. So, the argument from Varney there seems a bit overstated to me, but the situation of not knowing what the scale of the remaining defense was would impact that decision.
Also, remember, it seems as though Rosecrans was intending to ride back to Rossville that night after receiving word from Garfield and corresponding with the government. Garfield, after originally communicating along those lines, ultimately told him that he wouldn't be needed and that it was probably best for him to remain the night at Chattanooga.