would like to see a doc. about it.
good luck with that....I have looked for years, and found none. some scattering of stuff courtesy of Terry Jones (the Monty Python one). most of it is in book form: the more famous (to the west), is the Persian version, which is the earlier of the two--the ones who fought the Romans, and later their Byzantine successors: the Persians called them Savaran or something.