"Germans should be stronger than Celts" is an absurd statement in the context. The former only began making any major inroads against the latter centuries after the starting-date of the mod, as for that matter was the case with the Romans. It should be pretty darn obvious this was due to changing fortunes at the strategic level (such as both the Romans and Germans having gotten sufficiently organized and well armed) and not some "inherent" difference in strenght.
Moreover it contains an element of selling the rightly feared Celtic warrior class rather short.

Quote Originally Posted by blitzkrieg80
This is no disparage against France- they had more tanks and heavier tanks than the Germans at the time, so they weren't pacifists, but when it came time to fight to the end like they did heroically in WW1, they stopped way short.
France suffered the highest proportional casualties in WW1 you know. They lost something like one-fifth of an entire generation there. Small wonder they weren't keen on repeating the experience.

And yes, it's very irrelevant to the discussion.