We did a good job of it in WW II, esp. in Europe. Fact is, Confederate commanders, supposedly playing defense, never should have lost higher % of men than the Union, but they did almost every time. Says something about southern leadership, which is that it wasn’t as great as it was cooked up to be. “The butcher” Grant lost a lower % of men than any general he faced.
The CSA produced some of the greatest military leaders ever known such as Lee, Forrest, Dixon, Shelby, Jackson, AS Johnston, Mosby.