Here's wiki on the battle of marathon:
First Persian invasion of Greece - Wikipedia, the free encyclopedia
Size of the Persian force [edit]
According to Herodotus, the fleet sent by Darius consisted of 600 triremes.[46] There is no indication in the historical sources of how many transport ships accompanied them, if any. Herodotus claimed that 3,000 transport ships accompanied 1,207 triremes during Xerxes's invasion in 480 BCE.[47] Amongst modern historians, some have accepted this number of ships as reasonable; it has been suggested either that the number 600 represents the combined number of triremes and transport ships,[48][49] or that there were horse transports in addition to 600 triremes.[50]
Herodotus does not estimate the size of the Persian army, only saying that they formed a "large infantry that was well packed".[51] Among other ancient sources, the poet Simonides, a near-contemporary, says the campaign force numbered 200,000, while a later writer, the Roman Cornelius Nepos estimates 200,000 infantry and 10,000 cavalry.[52] Plutarch and Pausanias both independently give 300,000, as does the Suda dictionary;[53][54][55] Plato and Lysias assert 500,000; and Justin 600,000.[56][57][58]
Modern historians generally dismiss these numbers as exaggerations.[50] One approach to estimate the number of troops is to calculate the number of marines carried by 600 triremes. Herodotus tells us that each trireme in the second invasion of Greece carried 30 extra marines, in addition to a probable 14 standard marines.[59] Thus, 600 triremes could easily have carried 18,000–26,000 infantry.[50][60] Numbers proposed for the Persian infantry are in the range 18,000–100,000.[48][49][61][62][63] However, the consensus is around 25,000.[50][62]
The Persian infantry used in the invasion was probably a heterogeneous group drawn from across the empire. However, according to Herodotus, there was at least a general conformity in the type of armour and style of fighting.[64] The troops were, generally speaking, armed with a bow, 'short spear' and sword, carried a wicker shield, and wore at most a leather jerkin.[64][65] The one exception to this may have been the ethnic Persian troops, who may have worn a corslet of scaled armour.[64] Some of contingents would have been armed somewhat differently;[64]
for instance, the Saka were renowned axemen.[66] The
'elite' contingents of the Persian infantry seem to have been the ethnic Persians, Medians, Cissians and the Saka;[64]
Herodotus specifically mentions the presence of Persians and Saka at Marathon.[67] The style of fighting used by the Persians was probably to stand off from an enemy, using their bows (or equivalent) to wear down the enemy before closing in to deliver the coup de grace with spear and sword.[64]
Estimates for the cavalry are usually in the 1,000–3,000 range.[50][68] The Persian cavalry was usually provided by the ethnic Persians, Bactrians, Medes, Cissians and Saka; most of these probably fought as lightly armed missile cavalry.[64][69] The fleet must have had at least some proportion of transport ships, since the cavalry was carried by ship; whilst Herodotus claims the cavalry was carried in the triremes, this is improbable. Lazenby estimates 30–40 transport ships would be required to carry 1,000 cavalry.[50]
for the link.
Buddha was born in Nepal much much before the sakas came to India in around 500 BC.
you're probably right , that article was by someone who was in love with the scythians , Buddha's ethnicity though is through much debate