I have tried to look at Rosecrans objectively over the years, and I always come to the same conclusion. I don't fault him for the defeat at Chickamauga, the opening that occurred (at the worst possible place and moment) could have potentially happened to any commander. Where he dropped the ball in my opinion is how he reacted. Taking off and leaving the field, for any reason that can be argued in favor or against, just looks BAD. It was the aftermath, being holed up in Chattanooga, with supplies running low, food scarce, and he seemed frozen. ("Like a duck hit on the head") Lincoln summed it up best. If he IS stunned, frozen in place, do you want to retain him in said command?