On the scale of Barbarossa the operational level of war decides everything: it does not matter how good your commanders at the front are if the backup is not there.

So when you’re talking about Operation Barbarossa, to go back to your original question, Lex, you’re dealing with an operation on such a vast scale, that that operational level of war is absolutely vital to its chances of success or failure. It doesn’t matter how good your individual commanders are at the front. If you haven’t got the backup, it’s not going to work.