and Datis destroyed the city of Eretria and then set sail to Marathon.
Setting out from the coast of Asia Minor, Darius' fleet, led by Persian generals Datis and Artaphernes (with Hippias along for the ride), made for the Cyclades, an archipelago that included roughly 20 major inhabited islands east of mainland Attic Greece.
Miltiades and the rest of the Greek force reached Phaleron in time to prevent Artaphernes and the Persians from landing.
Under the command of his nephew Artaphernes
and the Median admiral Datis, this armada allegedly consisted of 600 ships (troop and transport, provided and manned by subject allies) and an unspecified number of Persian infantry and cavalry, described by Herodotus as `powerful and well-equipped'.
8) On the other hand, as the very important satrapy of Sardis was customarily assigned to members of the royal family, -- Artaphernes
, the brother of King Darius I (522-486), was the satrap of Sardis during the Ionian revolt -- it is highly probable that Pissouthnes had been given that satrapy by King Artaxerxes, because he was closely related to the royal family of Persia.