Consider this...

Regarding this whole canard about how we shouldn't change horses in mid-war: Exactly how many generals did Lincoln go through before he found Grant?

(non-exhaustive list: Winfield Scott, Irvin McDowell, George McClellan, John Pope, Ambrose Burnside, Don Carlos Buell, William Rosecrans, Henry Halleck, Joseph Hooker, George Meade, etc.)