LA BELLE EPOQUE (a sequel to the CONCERT OF EUROPE)

[Arjos]

Average speed, taken from Xenophon, is about 8 knots over a 236 km distance. Taking "a long day's voyage", that is 16 to 18 hours, counting a midday meal.
Thoukydides records also a non-stop 340 km voyage, in little over a day. But this would tire the men incredibly and they wouldn't be battle-ready.

Also the Peltastai for the Greeks is a bit too early. They were adopted as a consequence of the Persian Wars and the athenian expansion (especially in Thrake and Anatolia). Still I see no problem with very light, but in no way professional, javelin throwers for the 5th century BCE in Hellas.