Quote Originally Posted by The Panda Centurion
The Romans would never have achieved what they did without "barbarian" inventions and innovations.
Certainly, but still warfare equipment innovations, no engineering solutions...

The question is: in a realistic version of this game should Celtic and Germanic factions have complex engineering solutions as huge ashlar -not mampostery- walls and the most advanced siege machines available at an early stage of the represented era? And the answer is that those things were available only in the Mediterranean and Middle-East world: Celtics and Germans had not them in real life and they shouldn't have them in the game. Plus the nomadic Scythians had not even real cities.

Of course that doesn't mean they were uncivilized or an horde of orc-like grunts like some people use to imagine... Those were complex cultures with a rich idiosyncrasy. But had no onagers. Period.

BTW, those warry Iberian items were mostly innovations by Iberian cultures from the SE coast of Spain, which were by no means Celtic nor pure indigenous ones, but were highly influenced by Greek and Punic colonialism.

Anyway, all this is just an interesting debate without consecuences in the game modding: as far as I know all those things are 'hard-coded' and the modders can't mess too much with them.