Ancient army numbers

[Darth_Roach]

The days standards? What were the standards of the day?

30 thousand was already a large force. 300 thousand is ridiculous.

And 10 times any figure? very precise maths.

300 thousand = 30 thousand X 10

What I am trying to say is the Empire of Persia was more than 10 times the siz of Greece,
so they were well able to demand a massive levy to meet their needs.

Which is irrelevant as far as field army sizes go. Logistics are relevant not a hypothetical full levy. Plus I doubt they had much more than 300 thousand soldiers available anyway, since the core of the army was the Persian landed citizenry. Persians were among the least numerous peoples in the empire.

Precisely what figure, I cannot say, but I still think it would have been huge,
given the description of it's build up and it's movement through anatolia and across the Hellespont,

Even 80 thousand is already huge for 480BC. I doubt there is need to look in the hundreds of thousands.

All these areas, whether they submitted or not, would require garrisoning.

Yes, indeed. But that doesn't mean they could supply hundreds of thousands of troops in the first place.