\"Celtic\" military technology and the Romans

[Ab Aeterno]

Hi there,

Does anyone know of any primary evidence indicating that the Romans appropriated Spanish, Gaulish, Germanic or British weapons and armour to make the Roman legionary as we know it?

This book (http://books.google.co.uk/books/about/Te...Z4_PLChykC) claims that the Romans copied the shields, helmets, swords, pila and such forth from those classed loosely as 'Celts' and I'm wondering whether anyone has come across any evidence of this.

Thanks,
Michael