(Albert Sidney) Johnston tried and failed in 1861-(Early)1862 and failed pretty disappointingly.
There's little to indicate that he would have been a great general post-Shiloh if he'd survived that battle.
Look at how badly his defensive line crumbled when Grant moved. Even allowing for having some truly terrible subordinates (Even as the Western theater went), he failed.
As a guess, I would say he could have handled a division and possibly a corps. Army command, particularly when that really meant theater command, was beyond his skills.
__________________ Do your duty in all things. You cannot do more, you should never wish to do less. - Robert E. Lee
The probability that we may fail in the struggle ought not to deter us from the support of a cause we believe to be just. - Abraham Lincoln |