sentences:  Then they finally headed to Egypt.Modern estimates, however, place the number of Persian troops at the considerably lower figure of 25,000 men given that it would have been highly impractical to deprive the already strained satrapies of any more man power than that.Thucydides does not mention Artabazus, who is reported by Herodotus to have taken part in the second Persian invasion; Diodorus may be mistaken about his presence in this campaign.