Why Btonze Age?

[abaris]

They didn't actually...that's the myth of german superiority.  By the start of WW2 proper they had nearly a decade of "modern" combat experience and their designs changed to reflect that.

Yes, but still commuincating with flags between armored units and refueling in a long line, instead of the german on the fly system, using trucks by the roadside. Apart from the strategy of indepent tank units being implemented, apart from some rare cases.