What are the default unit models based on?

[Pellucid]

So all the DLC unit packs nicely tell us what their models are based on, but what are the default unit models? Are they generic amalgams of a bunch of cultures, or are they based on existing uniforms of the most prominent nations in each culture?

 

[ossha]

I thought it was just a standard european model (almost all western?) , that's what i always thought but i haven't put much thought in it.