Note 79 — Chapter IV · PERSIAN OPERATIONS IN EUROPE: B.C. 493–490. MARATHON.
Reading edition
The total loss of the Persians is given by Herodotus at 6400. This is not likely to be an understatement in that 6400 must have been included the greater part of the Persian centre, which seems to have been all but annihilated, if the circumstances of the battle be taken into consideration. It is thus against probability that more than 20,000 Persian troops took part in the engagement.
The comparative smallness of the Persian numbers is further indicated by the words which tradition attributed to Miltiades. He is said in the course of his appeal to Kallimachos (ch. 109) to have spoken confidently of success in case the Greeks took the offensive. There is no reason to insist on such words having been actually used by Miltiades. The important historical point is that in the tradition of the battle which Herodotus followed such language was attributed to him, language which could not conceivably have been used had the Persians very greatly outnumbered the Greeks.