There are times when Germany is not aggressive for some reason. For example, when invading Norway they dump like 25 units on Oslo which then sit there almost the entire game even though the Norwegian cities are all but defenseless. Eventually the Norwegian get to Modern Tanks and Modern armor and drive them out. I'll also seen big stacks of tanks just sitting in western Europe, too. If not for the automatic fall of France event I don't know if they would ever get anywhere. And Germany never manages to get anything going versus Russia, either.
This is a huge contrast with the Pacific scenario where the Japanese eventually steamroller everything. Sometimes they seem to delay and they don't bother with the small islands but they do come on strong. I've lost 4 times to the Japanese (in fact, never beaten them) while I've won every time against the Germans.