Battle of Marathon revised

The myth of Pheidippides' run is told by Herodotus (VI.105.1-3) as a myth, it is used as the catalyst for the cult of Pan in Athens.  I always find that interesting, it is during the Persian invasion that Athens adopt the deity responsible for 'Panic', maybe that's just me.

Have you read Krentz's new book on Marathon?  It is apparently a very impressive revision of the battle, I know Cartledge and van Wees speak very highly about it (according to their reviews at least).

Also the absence of Sparta is usually emphasised, but at the same time people forget they did a forced march to the battle site and were late by one day - if you look at the timings that was an impressive feat in itself, implying they did want to be there but were bound by religious obligation.

The Roman attempts around the time of the Imperial reformation (for want of a better term) to show continuity with Greek history and foundation are not unusual; one needs only to the read the Aeneid.  So if Livy did write about 300 Fabii (although I must confess I can't find the reference, is it possible for you to post it as I am intrigued) falling in a similar manner, it would appear to be along similar lines of Greek symmetry.  Although I'd be intrigued if the source shows just 300 dying, or like Herodotus, many many more who just aren't remembered anymore.

The marshes thing is perhaps more telling of the time of year and geography of the land, it is interesting how this plays such an important part in battles in Greece.  The impact of geography can often be overlooked in military history, not just on its impact in battle but also its influence in the evolution of military combat and tactics. 

Do you know of a Roman equivalent to Salamis or Plataea, outside of credible historical chronology?

Agreed. As more then anything else, among many considerations, Marathon remains an example of what can occur if disicpline and commitment to a cause can provide; reference facing superior numbers. For those who can't appreciate that, then I suggest they review the commentaries of the classicists on morale and motivation.