Another open access, albeit very short note.
https://www.cambridge.org/core/journals/classical-quarterly/article/herodotus-on-the-greeks-in-datis-army-at-marathon/39118C0038ED9959D483D161363E98CE
Another good find. One might almost think Herodotus was pro Greek ;D
An interesting article in its own right and discussion of it with my son ended with him posing the even more interesting question as to whether the war against Xerxes was the only war in which Sparta came out on top without the aid of Persian money!