Why Btonze Age?

[abaris]

But No one seem to argue that the German army was therefore an incompetent force.

Hitler made it an incompetent army later on. At the start of the war, it was led by brilliant strategists having learned their lessons from WWI. As opposed to their opponents, who won the first war and didn't see much reason to work on new strategies.

Hitler's hand is first shown in not allowing to move for Dunkirk, thereby allowing the allies to evacuate some 350.000 troops. It's largely down to him that the ensuing campaigns went badly. Apart from the fact that there was no chance in hell that an army of give or take ten millions could ever hope to hold and supply a frontline of 32.000 kilometers against a coalition which included the major industrial powers of this world.