I'm having an argument with my friend and he said that the entire army of the persians where made out of slaves, is this true?
Hey there! While there is plenty of room for further discussion, the following posts might provide you with some answers:
what changes, if any, did the Persians implement to their armies after the disastrous defeats to hoplite forces in the greco-persian wars? by /u/iphikrates
How historically accurate is the film 300? by /u/iphikrates
Xerxes military - slaves, conscripts, or free? by /u/lcnielsen and /u/ohea